九州大学-研究者情報 [加藤和利 (教授) システム情報科学研究院情報エレクトロニクス部門]

加藤和利（かとうかずとし）

データ更新日：2024.04.19

教授　／　システム情報科学研究院情報エレクトロニクス部門集積電子システム

学会発表等

1.	Bo Li, Ming Che, Shenghong Ye, Yoshiki Kamiura, Ryo Doi, Yuya Mikami, Kazutoshi Kato, Demonstration of 300-GHz Optoelectronic Beam Tracking Based on Received Signal Strength, IAPS Meeting / International Workshop '24 (IAPS 2024), 2024.03.
2.	Shenghong Ye, Naoto Masutomi, Bo Li, Ryo Matsumoto, Ryota Kaide, Haolan Tang, Yoshiki Kamiura, Ming Che,Yuya Mikami, Yuta Ueda, Kazutoshi Kato, Photonic Frequency Hopping Driven by High-Speed Wavelength Tunable Laser for Secure Terahertz-wave Communication, Optical Fiber Communication Conference(OFC2024), 2024.03.
3.	矢野拓弥, 車明, 陳漢偉, 清木直哉, 白水孝始, 三上裕也, 上田悠太, 加藤和利, テラヘルツ波を用いた2データ間のXOR演算による高セキュリティ無線通信システムの原理実証, 電子情報通信学会総合大会, 2024.03.
4.	銭程遠, 車明, 三上裕也, 加藤和利, 2mW出力動作300GHz帯単一走行キャリアフォトダイオードモジュール, 電子情報通信学会総合大会, 2024.03.
5.	川野聖人, 浅野葵, 土居諒, 三上裕也, 李　波, 加藤和利, 光ファイバの波長分散を利用したフォトミキシングによるテラヘルツ波ビームステアリング, 電子情報通信学会総合大会, 2024.03.
6.	貝出凌汰, 葉聖鴻, 松本凌, 桝冨直人, 三上裕也, 上田悠太, 加藤和利, 波長可変レーザを用いた2値周波数変調テラヘルツ波通信, 電子情報通信学会総合大会, 2024.03.
7.	矢野拓弥, 車明, 陳漢偉, 清木直哉, 白水孝始, 三上裕也, 上田悠太, 加藤和利, テラヘルツ波を用いた２データ間のXOR演算による高セキュリティ無線通信システムの原理実証, 電子情報通信学会電子デバイス研究会, 2023.12.
8.	松本凌, 桝冨直人, 貝出凌汰, 三上裕也, 上田悠太, 加藤和利, 高速波長可変レーザの波長切替特性評価と光スイッチへの適用検討, 電子情報通信学会電子デバイス研究会, 2023.12.
9.	Aoi Asano, Masato Kawano, Ryo Doi1, Bo Li, Yuya Mikami, and Kazutoshi Kato, Photonic Terahertz Wave Beam Steering by Chromatic Dispersion of Optical Fibers, 電子情報通信学会光エレクトロニクス研究会, 2023.12.
10.	Hiroki Agemori, Ryo Doi, Yoshiki Kamiura, Hussein Ssali, Ming Che, Yuya Mikami, and Kazutoshi Kato, Terahertz Wave Power Enhancement by Combining Currents from Arrayed Photomixers, 電子情報通信学会光エレクトロニクス研究会, 2023.12.
11.	Chengyuan Qian, Ming Che, Amalina Athira Binti Ibrahim, Yuya Mikami and Kazutoshi Kato, 2-mW output 300-GHz Uni-Traveling-Carrier Photodiode Module, 電子情報通信学会光エレクトロニクス研究会, 2023.12.
12.	Bo Li, Yuya Mikami, Ryo Doi, Aoi Asano, Kazutoshi Kato, 300 GHz Receiver Tracking by Photonic Terahertz Wave Beam Steering, 電子情報通信学会光エレクトロニクス研究会, 2023.12.
13.	Haolan Tang, Shenghong Ye, Bo Li, Chong Zhang, Naoto Masutomi, Yuya Mikami, Kazutoshi Kato, High-Speed Wavelength Switching at Tunable DFB Laser Array by Iterative Learning Control, 電気・情報関係学会九州支部連合大会, 2023.09.
14.	銭程遠, 三上裕也, 加藤和利, ハイパワーテラヘルツ波源を目標とした真空走行キャリアフォトダイオード, 電気・情報関係学会九州支部連合大会, 2023.09.
15.	張茺, 李波, 唐浩嵐, 葉聖鴻, 車明, 三上裕也, 加藤和利, DFBレーザアレーによるテラヘルツ波発生における周波数安定化法の提案と性能評価, 電気・情報関係学会九州支部連合大会, 2023.09.
16.	貝出凌汰, 葉聖鴻, 松本凌, 桝冨直人, 三上裕也, 上田悠太, 加藤和利, 波長可変レーザを用いた2値周波数変調テラヘルツ波の生成手法の実証, 電気・情報関係学会九州支部連合大会, 2023.09.
17.	岩本真治, 矢野拓弥, 三上裕也, 加藤和利, アレーUTC-PD送信器によるテラヘルツ波の伝送実験, 電気・情報関係学会九州支部連合大会, 2023.09.
18.	上森大暉, 紙浦欣輝, SsaliHussein, 三上裕也, 加藤和利, アレーフォトミキサの電力合成による大出力テラヘルツ波源, 電気・情報関係学会九州支部連合大会, 2023.09.
19.	川野聖人, 土居諒, 李波, 浅野葵, 車明, 三上裕也, 加藤和利, 光フェーズドアレーと８アレーフォトミキサを用いたテラヘルツ波ビームステアリング, 電気・情報関係学会九州支部連合大会, 2023.09.
20.	紙浦欣輝, 三上裕也, 加藤和利　, THz波発生用シリコンフォトニクス光フェーズドアレー, 電子情報通信学会光エレクトロニクス研究会, 2023.06.
21.	李波, 三上裕也, 土居諒, 浅野葵, 加藤和利, ヒルクライミングアルゴリズムを用いたTHz波の高速ビームトラッキング, 電子情報通信学会光エレクトロニクス研究会, 2023.06.
22.	浅野葵, 土居諒, 李波, 三上裕也, 加藤和利, 300GHzテラヘルツ波ビームステアリング―光ファイバの波長分散を用いたアレーフォトミキシングー, 電子情報通信学会光エレクトロニクス研究会, 2023.06.
23.	桝冨直人, 松本凌, 三上裕也, 上田悠太, 加藤和利, 単一光源自己遅延テラヘルツパルス波発生法の考案と原理実証, 電子情報通信学会光エレクトロニクス研究会, 2023.06.
24.	土居諒, 李波, 浅野葵, 車明, 三上裕也, 加藤和利, 石英光フェーズドアレーによるテラヘルツ波ビーム制御, 電子情報通信学会光エレクトロニクス研究会, 2023.06.
25.	Kazutoshi Kato, Amalina Athira Ibrahim, Terahertz-Wave Phase Modulation at Photo-mixing by Interferometric Phase Stabilization, Teratech 2023, 2023.09.
26.	Hussein Ssali, Kazutoshi Kato, Terahertz Wave Power Enhancement Using T-Junction Connected UTC-PDs on SiC Substrate, Teratech 2023, 2023.09.
27.	Naoto Masutomi, Shenghong Ye, Ryo Matsumoto, Bo Li, Haolan Tang, Yuya Mikami, Yuta Ueda, Kazutoshi Kato, THz-wave Pulse Frequency-Amplitude Modulation Enabled by Single Wavelength-Tunable Laser, 28th Microoptics Conference (MOC 2023), 2023.09.
28.	Yoshiki Kamiura, Hussein Ssali, Hiroki Agemori, Ryo Doi, Yuya Mikami, Kazutoshi Kato, Novel terahertz wave power combining technique by arrayed photomixers, 28th Microoptics Conference (MOC 2023), 2023.09.
29.	Ming Che, Kazuya Kondo, Ryo Doi, Kazutoshi Kato, Fiber-coupled UTC-PD Array for THz Beam Steering Assisted by Genetic Algorithm, IRMMW2023, 2023.09.
30.	Bo Li, Shenghong Ye, Ming Che, Haolan Tang, Kazutoshi Kato, Demonstration of Frequency Hopping in 300-GHz Band by Photomixing using Tunable DFB Laser Array, 28th Microoptics Conference (MOC 2023), 2023.09.
31.	Fiber-coupled UTC-PD Array for THz, Beam Steering, Assisted by Genetic Algorithm, Automatic terahertz wave beam control by optical phase optimization by 4-arrayed UTC-PDs, 28th Microoptics Conference (MOC 2023), 2023.09.
32.	Ming Che, Kazuya Kondo, Ryo Doi, Kazutoshi Kato, Demonstration of Combined and Steered 300-GHz Waves via Optoelectronic Phased Array, OFC2023, 2023.03.
33.	浅野葵, 近藤和哉, 土居諒, 三上裕也, 加藤和利, 光ファイバの波長分散を用いた4アレーフォトミキサによるテラヘルツ波ビームステアリング, 電子情報通信学会総合大会, 2023.03.
34.	土居諒, 近藤和哉, 車明, 三上裕也, 加藤和利, 光フェーズドアレーと8アレーフォトミキサを用いたテラヘルツ波の強度増大, 電子情報通信学会総合大会, 2023.03.
35.	Qingjie Song, Yuya Mikami, Kazutoshi Kato, Demonstration of 405-nm Two-Tone Lightwave for Terahertz-wave Generation at InGaN Photodiode, Asia-Pacific Microwave Conference (APMC2022), 2022.12.
36.	Hussein Ssali, Ming Che, Kazutoshi Kato, Performance Analysis of a Wilkinson Power Combiner-Fed Patch Antenna for 300-GHz Arrayed Photomixers, 10th International Japan-Africa Conference on Electronics, Communications, and Computations (JAC-ECC 2022), 2022.12.
37.	Amalina Athira Ibrahim, Hanwei Chen, Takashi Shiramizu, Yuya Mikami, Kazutoshi Kato, Terahertz-Wave Phase Modulation Enabled by Optical Interferometric Phase Stabilization, Asia-Pacific Microwave Conference (APMC2022), 2022.12.
38.	グエンカオサン, 宋慶傑, 三上裕也, 加藤和利, 高出力テラヘルツ波発生に向けた 405nm 帯二光波生成, 電子情報通信学会光エレクトロニクス研究会, 2022.12.
39.	Hanwei Chen, Yusuke Kawai, Takuya Yano, Ssali Hussein, Kazutoshi Kato, Demonstration of 500 Mbit/s Data Transmission Utilizing Secure Terahertz Communication Enabled by Phased Array UTC-PDs, Asia-Pacific Microwave Conference (APMC2022), 2022.11.
40.	Naoya Seiki, Takashi Shiramizu, Ryo Matsumoto, Naoto Masutomi, Yuya Mikami, Yuta Ueda, Fumito Nakajima, Kazutoshi Kato, THz-wave intensity modulation by combining a high-speed wavelength-tunable laser and photomixing technique, Asia-Pacific Microwave Conference (APMC2022), 2022.11.
41.	Amalina Athira Ibrahim, Takashi Shiramizu, Shenghong Ye, Yuya Mikami, Kazutoshi Kato, Pilot-Lightwave-based Terahertz Wave Phase Stabilization, 28th International Semiconductor Laser Conference (ISLC 2022), 2022.10.
42.	Takashi Shiramizu, Naoya Seiki, Ryo Matsumoto, Naoto Masutomi, Yuya Mikami, Yuta Ueda, Wataru Kobayashi, Fumito Nakajima, Kazutoshi Kato, Demonstration of Novel THz Wave Generation Based on a Fast Wavelength Switching Laser, 27th Microoptics Conference (MOC 2022), 2022.09.
43.	Hanwei Chen, Yusuke Kawai, Takuya Yano, Yuya Mikami, Kazutoshi Kato, Demonstration of Secure Wireless Transmission at 500 Mbit/s Based on 300-GHz Waves from Separated Transmitters, 27th Microoptics Conference (MOC 2022), 2022.09.
44.	Qingjie Song, Yuya Mikam, Kazutoshi Kato, First Demonstration of 405-nm Two-Tone Lightwave from GaN Laser for High Power Terahertz Wave Generation, 2022.09.
45.	宋慶傑, 三上裕也, 加藤和利, InGaN真空フォトダイオード用405nm帯二光波生成, 電子情報通信学会ソサイエティ大会, 2022.09.
46.	Amalina Athira Ibrahim, Takashi Shiramizu, Hanwei Chen, Yuya Mikami, Kazutoshi Kato, Novel Phase Stabilization Technique at Photomixing-BasedTerahertz Wave Phase Modulation System, 27th Microoptics Conference (MOC 2022), 2022.09.
47.	Kazuya Kondo, Ming Che, Ryo Doi, Kazutoshi Kato, THz-Wave Beam Steering with 4-Channel Optical Phased Array, 27th Microoptics Conference (MOC 2022), 2022.09.
48.	山内健太, 河合優佑, 車明, 伊藤弘, 石橋忠夫, 加藤和利, コヒーレント検波による2キャリア間のアンド演算を用いた暗号化無線伝送システムの原理実証, 電子情報通信学会ソサイエティ大会, 2022.09.
49.	陳漢偉, 河合優佑, 矢野拓弥, 三上裕也, 加藤和利, テラヘルツ波高セキュリティ通信を用いた500 Mbit/s 無線伝送, 電子情報通信学会ソサイエティ大会, 2022.09.
50.	加藤和利, フォトミキシングによる光－テラヘルツ波信号変換技術, 電子情報通信学会ソサイエティ大会, 2022.09.
51.	土居諒, 近藤和哉, 車明, 三上裕也, 加藤, 光フェーズドアレーとアレーフォトミキサを用いたテラヘルツ波の強度増大, レーザー学会九州支部学生講演会, 2022.09.
52.	桝冨直人, 白水孝始, 清木直哉, 松本凌, 三上裕也, 上田悠太, 加藤和利, 波長可変レーザーによるテラヘルツパルス波生成, レーザー学会九州支部学生講演会, 2022.09.
53.	桝冨直人, 白水孝始, 清木直哉, 松本凌, 三上裕也, 上田悠太, 加藤和利, 波長可変レーザを用いたテラヘルツ波発生法の実証, 電気・情報関係学会九州支部連合大会, 2022.09.
54.	三上裕也, 白水孝始, 清木直哉, 松本凌, 桝冨直人, 上田悠太, 加藤和利, 高速波長可変レーザーを活用したテラヘルツ波の生成手法とその応用, レーザー学会九州支部講演会, 2022.09.
55.	矢野拓弥, 河合祐介, 陳漢偉, 三上裕也, 加藤和利, 二つのテラヘルツ波のアンド演算によるギガビット級高セキュリティ無線通信の実証, 電子情報通信学会光エレクトロニクス研究会, 2022.06.
56.	加藤和利, 光技術によるテラヘルツ波発生と超高速無線通信への応用, 2022年度第1回光材料・応用技術研究会, 2022.06.
57.	松本凌, 葉聖鴻, 三上裕也, 加藤和利, 波長可変DFBレーザアレーの発振波長の電流/温度依存性のモデル化, 電子情報通信学会光エレクトロニクス研究会, 2022.06.
58.	Cao Son NGUYEN, Kazuya KONDO, Kazutoshi KATO, Estimation of Minimum Detectable Power for 4K Video Terahertz-wave Transmission, IAPS Meeting 2022 / International Workshop ’22 in Fukuoka, 2022.03.
59.	Amalina Athira Ibrahim, Shenghong YE, Takashi SHIRAMIZU, Kazutoshi KATO, Phase Stabilization of Two-Tone Lightwave in Photomixing for Coherent Millimeter-wave Carrier Generation, IAPS Meeting 2022 / International Workshop ’22 in Fukuoka, 2022.03.
60.	井田萌々音, 齋藤匠, 加藤和利, 光ファイバの波長分散特性を用いた300GHz帯テラヘルツ波ビームステアリング, 電子情報通信学会総合大会, 2022.03.
61.	Yusuke Kawai, Hanwei Chen, Kazutoshi Kato, Feasibility demonstration of terahertz-wave communication with physical-layer security, SPIE Photonics West, 2022.03.
62.	Shenghong Ye, Ming Che, Takeshi Kuboki, Kazutoshi Kato, Full-C-Band High-speed High-reliability Wavelength Switching at Tunable DFB Laser Array with Current/Temperature Cooperative Control, SPIE Photonics West, 2022.03.
63.	桝冨直人, 白水孝始, 清木直哉, 松本凌, 三上裕也, 上田悠太, 加藤和利, 高速波長可変レーザとアレー導波路回折格子を用いたテラヘルツパルス波発生, 電子情報通信学会総合大会, 2022.03.
64.	矢野拓弥, 河合優佑, 陳漢偉, 加藤和利, 2キャリア間のアンド演算を用いたテラヘルツ波通信の通信可能信号強度比の検討, 電子情報通信学会総合大会, 2022.01.
65.	松本　凌, 葉　聖鴻, 車　明, 加藤和利, DFBレーザアレーの注入電流/温度協調制御によるフルCバンド高速高信頼波長切替, 電子情報通信学会総合大会, 2022.01.
66.	河合優佑, 陳漢偉, 加藤和利, RoF技術を活用した高セキュリティ無線システムの実現に向けた二光波間のアンド演算実証実験, レーザー学会学術講演会第42回年次大会, 2022.01.
67.	葉聖鴻, 車明, 加藤和利, DFB レーザーアレーの注入電流／温度協調制御によるフル C バンド高速高信頼波長切替, レーザー学会学術講演会第42回年次大会, 2022.01.
68.	Shenghong Ye, Ming Che, Takeshi Kuboki, Kazutoshi Kato, Demonstration of Bi-directional 400-GHz-wide High-speed High-reliability Wavelength Switching at DFB Laser with Current/Temperature Cooperative Control, Photonics and Electromagnetics Research Symposium 2021, 2021.11.
69.	Yuki Matsuo, Kazuya Kondo, Kazutoshi Kato, 300-GHz Terahertz Wave Beam Steering using 8-arrayed Arrayed UTC-PDs, Photonics and Electromagnetics Research Symposium 2021, 2021.11.
70.	Takumi Saito, Kazutoshi Kato, Terahertz-Wave Beam Steering by Wavelength Tuning at Dispersive Optical Fibers, Photonics and Electromagnetics Research Symposium 2021, 2021.11.
71.	Ruo Yamamoto, Kazutoshi Kato, Novel autocorrelation system for high-repetition THz pulse wave, Photonics and Electromagnetics Research Symposium 2021, 2021.11.
72.	Yusuke Kawai, Kenta Yamauchi, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, Demonstration of Secure Wireless Communication System Using a Pair of Terahertz-Wave Beams, Photonics and Electromagnetics Research Symposium 2021, 2021.11.
73.	Ming Che, Yuki Matsuo, Kazuya Kondo, Kazutoshi Kato, Arrayed Uni-traveling-carrier Photodiodes for Pulsed THz Wave Beam Steering, 2021 International Topical Meeting on Microwave Photonics, 2021.11.
74.	Yusuke Kawai, Kenta Yamauchi, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, Demonstration of Data Transmission Based on AND Operation between Two Terahertz Waves for Secure Wireless Communication, 2021 International Topical Meeting on Microwave Photonics, 2021.11.
75.	加藤和利, 光エレクトロニクスを活用したテラヘルツ波通信技術, 電子情報通信学会光エレクトロニクス研究会, 2021.11.
76.	近藤和哉, 車　明, 加藤和利, 光フェーズドアレイを用いたテラヘルツビーム最適制御法の提案, 電子情報通信学会光エレクトロニクス研究会, 2021.11.
77.	宋慶傑, 山本留央, 白水孝始, 加藤和利, Terahertz wave beam-steering by photomixing using phase control of optical waves, 電子情報通信学会光エレクトロニクス研究会, 2021.11.
78.	陳漢偉, 河合優佑, 加藤和利, High-Security Wireless Communication using AND Operation between Two Carriers －Evaluation of the effect of signal intensity ratio and phase difference on BER using two light waves－, 電子情報通信学会光エレクトロニクス研究会, 2021.11.
79.	Kazutoshi Kato, Photonics-Assisted Terahertz Beam Control, 9th Russia-Japan-USA-Europe Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies (RJUSE TeraTech-2021), 2021.11.
80.	Takumi Saito, Shigehiro Takasaka, Kazutoshi Kato, Terahertz-Wave Beam Steering by Photomixing with Chromatic Dispersion of Optical Fibers, 26th Microoptics Conference (MOC), 2021.09.
81.	Kazuya Kondo, Yuki Matsuo, Kazutoshi Kato, 60-Times Power Enhancement of 300-GHz Terahertz Wave by 8-arrayed UTC-PDs, 26th Microoptics Conference (MOC), 2021.09.
82.	陳漢偉, 河合優佑, 加藤和利, テラヘルツ波を用いた高セキュリティ通信の提案とその復号法の検討, 電気・情報関係学会九州支部連合大会, 2021.09.
83.	Qingjie Song, Ruo Yamamoto, Takashi Shiramizu, Kazutoshi Kato, Novel method of terahertz-wave beam steering using optical frequency comb and chromatic dispersion at an optical fiber, 電気・情報関係学会九州支部連合大会, 2021.09.
84.	齋藤匠, 高坂繁弘, 加藤和利, 光ファイバの波長分散特性を用いたテラヘルツ波ビームステアリング, 電子情報通信学会ソサイエティ大会, 2021.09.
85.	山本留央, 加藤和利, 高繰り返しテラヘルツパルス波の測定に向けた新規自己相関系, 電子情報通信学会ソサイエティ大会, 2021.09.
86.	松尾祐輝, 近藤和哉, 加藤和利, 8 アレーUTC-PDを用いた300GHz帯ビームステアリング, 電子情報通信学会ソサイエティ大会, 2021.09.
87.	河合優佑, 陳漢偉, 加藤和利, 二信号間のアンドを用いた高セキュリティ無線通信の動作検証, 電子情報通信学会ソサイエティ大会, 2021.09.
88.	葉　聖鴻, 車　明, 久保木　猛, 加藤和利, DFB レーザの注入電流／温度協調制御によるサブ秒波長切替, 電子情報通信学会ソサイエティ大会, 2021.09.
89.	河合優佑, 山内健太, 加藤和利 , テラヘルツ波を用いた高セキュリティ無線システムの原理確認, 応物学会秋季学術講演会, 2021.09.
90.	陳漢偉, 河合優佑, 加藤和利, 高セキュリティテラヘルツ波通信の提案とその復号法の検討, 応物学会秋季学術講演会, 2021.09.
91.	宋慶傑, 山本留央, 白水孝始, 加藤和利, 光ファイバの波長分散を用いたテラヘルツ波ビームステアリング法の提案, 応物学会秋季学術講演会, 2021.09.
92.	葉聖鴻, 車明, 久保木猛, 加藤和利 , 光通信用 DFB レーザの注入電流/温度協調制御による双方向高速高信頼波長切替, 応物学会秋季学術講演会, 2021.09.
93.	加藤和利, フォトミキサを用いたテラヘルツ波発生と通信への応用, 電子情報通信学会コミュニケーションクオリティ(CQ)研究会, 2021.09.
94.	河合優佑, 陳漢偉, 加藤和利, テラヘルツ波を用いた高セキュリティ通信システムの原理確認, レーザー学会九州支部学生講演会, 2021.09.
95.	Kazutoshi Kato, Terahertz-Wave Beam Generation by Photonic Integrated Device, URSI-GASS, 2021.08.
96.	白水孝始, 加藤和利, テラヘルツパルス波通信に向けたパルス幅の狭窄化, 電子情報通信学会光エレクトロニクス研究会, 2021.06.
97.	清木直哉, 加藤和利, 波長可変分布活性DFBレーザのCバンド帯域高速波長切替 , 電子情報通信学会光エレクトロニクス研究会, 2021.06.
98.	宋慶傑, 山本留央, 白水孝始, 加藤和利, テラヘルツパルス波生成に向けて波形改善の研究, 電子情報通信学会光エレクトロニクス研究会, 2021.06.
99.	近藤和哉, 加藤和利, 8アレーUTC-PDを用いたテラヘルツ波のビームスアリング, 電子情報通信学会光エレクトロニクス研究会, 2021.06.
100.	陳　韓偉, 加藤和利, フォトミキシングによるテラヘルツ波を用いた高セキュリティ無線通信における新たな復号法の原理確認, 電子情報通信学会光エレクトロニクス研究会, 2021.06.
101.	河合優佑, 山内健太, 伊藤弘, 石橋忠夫, 加藤和利, テラヘルツ波を用いた高セキュリティ無線システムの原理実証, 電子情報通信学会総合大会, 2021.03.
102.	白水孝始, 一山昂平, 山本留央, 加藤和利, テラヘルツパルス無線通信に向けた光パルス幅の狭窄化, 電子情報通信学会総合大会, 2021.03.
103.	近藤和哉, 松尾祐輝, 加藤和利, 8アレーUTC-PDを用いた300GHzテラヘルツ波の強度増大, 電子情報通信学会総合大会, 2021.03.
104.	清木直哉, 新谷友里, 久保木猛, 加藤和利, 非線形モデルを用いた波長可変レーザ発振直後の高速波長安定化, 電子情報通信学会総合大会, 2021.03.
105.	Younjin Kim, Kazutoshi Kato, 600-GHz Wave Generator Consisting of Arrayed Light Sources in Combination with Arrayed Photomixers, The 46th European Conference on Optical Communication (ECOC2020), 2020.12.
106.	Kenta Yamauchi, Yusuke Kawai, Ming Che, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, Terahertz Heterodyne AND Operation for Physically Encrypted Wireless Communication, The 46th European Conference on Optical Communication (ECOC2020), 2020.12.
107.	Kazutoshi Kato, Beam forming and steering of terahertz wave by arrayed photomixers, The 46th European Conference on Optical Communication (ECOC2020), 2020.12.
108.	加藤和利, 光位相制御技術を用いたTHz発生と通信への応用, Microwave Workshops & Exibition (MWE) 2020, 2020.11.
109.	Ssali Hussein, Kazutoshi Kato, Gap-Assisted Power Enhancement of THz Wave at Planar Antenna on Semiconductor Substrate, 2020 International Topical Meeting on Microwave Photonics (MWP), 2020.11.
110.	Takumi Saito, Kazutoshi Kato, Novel Terahertz-Wave Beam Steering Method by Photomixing with Chromatic Dispersion of Optical Fibers, 2020 International Topical Meeting on Microwave Photonics (MWP), 2020.11.
111.	河合優佑, 山内健太, 加藤和利, 高指向性テラヘルツ波を用いた高セキュリティ無線通信の原理確認－ホモダイン検波及びヘテロダイン検波によるアンド演算の実現－, 電子情報通信学会光エレクトロニクス研究会, 2020.11.
112.	山本留央, 加藤和利, テラヘルツ波自己相関計によるサブテラヘルツ繰り返し光波形測定, 電子情報通信学会光エレクトロニクス研究会, 2020.11.
113.	松尾祐輝, 車明, 金谷晴一, 加藤和利, 並列接続UTC-PDによるTHz波電力倍増, 電子情報通信学会光エレクトロニクス研究会, 2020.11.
114.	葉聖鴻, 新谷友里, 久保木猛, 加藤和利, 光通信用DFBレーザの注入電流および温度協調制御による高信頼なサブミリ秒波長切替手法の検討, 電子情報通信学会光エレクトロニクス研究会, 2020.11.
115.	齋藤匠, 加藤和利, 光ファイバの波長分散特性を用いたテラヘルツ波ビームステアリング法, 電子情報通信学会光エレクトロニクス研究会, 2020.11.
116.	山内健太, 山本留央, 車明, 伊藤弘, 石橋忠夫, 加藤和利, 2キャリア間のアンド演算を用いた無線通信信号の暗号化の検討, 電子情報通信学会ソサイエティ大会, 2020.11.
117.	新谷友里, 河野隼太, 久保木猛, 加藤和利, 切替幅800 GHzにおけるTDA-DFBレーザの高速波長切替, 電子情報通信学会ソサイエティ大会, 2020.11.
118.	一山昂平, 山本留央, 加藤和利, THz自己相関系を用いたテラヘルツパルス列観測, 電子情報通信学会ソサイエティ大会, 2020.11.
119.	Yuri Niiya, Takeshi Kuboki, Kazutoshi Kato, Wide-Range Wavelength Switching at TDA-DFB Laser by Nonlinear Model, 25th OptoElectronics and Communications Conference (OECC), 2020.10.
120.	Shenghong Ye, Shunta Kono, Yuri Niiya, Ming Che, Takeshi Kuboki, Kazutoshi Kato, Demonstration of 2-ms High-Reliability Wavelength Switching at TLA with Current/Temperature Cooperative Control, 25th OptoElectronics and Communications Conference (OECC), 2020.10.
121.	Kenta Yamauchi, Ruo Yamamoto, Ming Che, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, Physical encryption method using AND operation between two carriers for high-security wireless communication, 25th OptoElectronics and Communications Conference (OECC), 2020.10.
122.	Ruo Yamamoto, Kazutoshi Kato, Sub-THz-Repetition Optical Waveform Measurement by Novel THz-wave Autocorrelator, 25th OptoElectronics and Communications Conference (OECC), 2020.10.
123.	Yuki Matsuo, Ming Che, Haruichi Kanaya, Kazutoshi Kato, THz-Wave Power Multiplication by Parallel-Connection UTC-PDs, 25th OptoElectronics and Communications Conference (OECC), 2020.10.
124.	Kohei Ichiyama, Ruo Yamamoto, Kazutoshi Kato, Generation and Observation of 200-GHz-Repetition Electromagnetic Pulse by THz Autocorrelator, 25th OptoElectronics and Communications Conference (OECC), 2020.10.
125.	河合優佑, 山内健太, 加藤和利, テラヘルツ波の重ね合わせを用いた暗号化無線通信の原理確認, 電気・情報関係学会九州支部連合大会, 2020.10.
126.	近藤和哉, 松尾祐輝, 加藤和利, 出射角拡大レンズを用いた300GHzテラヘルツ波のビームステアリング, 電気・情報関係学会九州支部連合大会, 2020.10.
127.	白水孝始, 山本留央, 加藤和利, テラヘルツ波における無反射膜の有用性の確認, 電気・情報関係学会九州支部連合大会, 2020.10.
128.	新谷友里, 久保木猛, 加藤和利, 非線形モデルによるTDA-DFBレーザーの高速波長切替制御, レーザー学会九州支部学生講演会, 2020.09.
129.	山内健太, 山本留央, 加藤和利, コヒーレント検波を利用した暗号化光無線伝送システムの原理実証, レーザー学会九州支部学生講演会, 2020.09.
130.	Takeshi Kuboki, Younjin Kim, Haruichi Kanaya, Kazutoshi Kato, Integrated Terahertz Wave Generator for Wireless Communication with Photonic Technology, 2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT), 2020.09.
131.	Kazutoshi Kato, Terahertz-wave beam control by photonics technology, Proceedings of SPIE - The International Society for Optical Engineering, 11499, 2020.08.
132.	松尾祐輝, 車明, 金谷晴一, 加藤和利, フォトミキサ並列化によるテラヘルツ波強度増大, 電子情報通信学会総合大会, 2020.03.
133.	山内健太, 加藤和利, 高セキュリティ無線通信の提案と動作原理実証, 電子情報通信学会総合大会, 2020.03.
134.	山本留央, 加藤和利, テラヘルツ波自己相関計による高速光波形の高分解能測定, 電子情報通信学会総合大会, 2020.03.
135.	齋藤匠, 内藤裕太, 加藤和利, 光ファイバの波長分散特性を用いたテラヘルツ波位相制御, 電子情報通信学会総合大会, 2020.03.
136.	Kohei Ichiyama, Ken Mitsueda, Kazutoshi Kato, 400-GHz Repetition Optical Pulse Train by Time-domain-multiplexing technology, 電子情報通信学会光エレクトロニクス研究会, 2019.12.
137.	Kenta Yamauchi, Kazutoshi Kato, Novel Encryption Method by AND Operation between Two Carriers for High-Security Terahertz Wave Communication, 電子情報通信学会光エレクトロニクス研究会, 2019.12.
138.	Yuri Niiya, Shunta Kono, Takeshi Kuboki, Kazutoshi Kato, High-speed 600-GHz-wide wavelength switching at TDA DFB laser, 電子情報通信学会光エレクトロニクス研究会, 2019.12.
139.	Yuta Naito, Kenta Yamauchi, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, Photonic Controlling THz-Wave Beam Steering with Sub-milliseconds Repetition Period, 2019 Asia-Pacific Microwave Conference (APMC2019), 2019.12.
140.	Yuri Niiya, Shunta Kono, Takeshi Kuboki, Kazutoshi Kato, High-Speed Wide-Range Wavelength Switching for Tunable Distributed Amplification (TDA-) DFB Laser Based on Nonlinear Model, MOC2019, 2019.11.
141.	Shunta Kono, Yuri Niiya, Takeshi Kuboki, Kazutoshi Kato, Cooperative Control of Injection Current and Temperature at DFB-LD for High-speed High-Reliability Wavelength Switching, MOC2019, 2019.11.
142.	Kohei Ichiyama, Ken Mitsueda, Kazutoshi Kato, Multiplication of Repetition Frequency at Optical Pulse Train Generated from OpticalFrequency Comb, MTSA2019, 2019.10.
143.	Kenta Yamauchi, Kazutoshi Kato, Demonstration of AND Operation between Two Carriers for Encryptionat Secured TerahertzWave Communication, MTSA2019, 2019.10.
144.	Younjin Kim, Takeshi Kuboki, Kazutoshi Kato, Arrayed Light Sources for Photonic Terahertz Wave Generation, MTSA2019, 2019.10.
145.	Nanami Nishiyama, Zhou Yang, Kazutoshi Kato, Impact of AR coating on THz Wave Radiation from Arrayed Photomixers/Antennas, MTSA2019, 2019.10.
146.	Kazutoshi Kato, Generation and Control of Terahertz-Wave Beam by Photonics Technology, MTSA2019, 2019.10.
147.	Takeshi Kuboki, Kazutoshi Kato, Haruichi Kanaya, Miniatured Impedance Matched Planar Antenna Integrated High Efficient Push-Pull PA for 5-GHz Wireless Communication, URSI-JRSM 2019, 2019.09.
148.	内藤裕太, 山内健太, 伊藤弘, 石橋忠夫, 加藤和利, 光位相制御によるサブミリ秒繰り返しテラヘルツ波ビームステアリングの実現, 電子情報通信学会ソサイエティ大会2019, 2019.09.
149.	久保木猛, 山中友輔, 加藤和利, 半導体光増幅器の相互利得変調による光－無線メディア変換の性能向上, 電子除法通信学会ソサイエティ大会2019, 2019.09.
150.	Ming Che, Nanami Nishiyama, Kenta Yamauchi, Takeshi Kuboki, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, 450-GHz-Wave Beam-Steering with 1 kHz Repetition by Optical Phase Control, MTSA2019, 2019.09.
151.	Ruo Yamamoto, Kohei Ichiyama, Ming Che, Takeshi Kuboki, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, 100-GHz Optical Waveform Measurement by Novel Lightwave/THz-wave Interferometer, MTSA2019, 2019.09.
152.	河野隼太, 新谷友里, 久保木猛, 加藤和利, 注入電流／温度連携制御によるDFBレーザの高速波長切替, 電子情報通信学会ソサイエティ大会2019, 2019.08.
153.	Ming Che, Takeshi Kuboki, Kazutoshi Kato, Trellis Coded Three Dimensional Carrierless Amplitude and Phase Modulation, OECC2019, 2019.07.
154.	坂野豪紀・周洋・金谷晴一・加藤和利, フォトミキサアレーを用いた空間合成によるテラヘルツ波高出力化, 電子情報通信学会論文誌 C, 2019.04.
155.	山内健太, 西山七海, 周洋, 伊藤弘, 石橋忠夫, 加藤和利, 光位相調整によるアレーフォトミキサ放射テラヘルツ波の偏向角の検討, 電子情報通信学会, 2019.04.
156.	新谷友里, 福田浩規, 河野隼太, 久保木猛, 加藤和利, 高速波長可変TDA-DFBレーザの波長切替幅増大の検討, 電子情報通信学会光エレクトロニクス研究会, 2019.04.
157.	一山昂平, 光枝健, 加藤和利, 光コムから生成した光パルス列の時間多重による繰り返し周波数倍増の検討, 電子情報通信学会光エレクトロニクス研究会, 2019.04.
158.	新谷友里・福田浩規・河野隼太・加藤和利・久保木猛, 非線形モデルによるTDA-DFBレーザの高速波長切替幅拡大, 電子情報通信学会総合大会大会2019, 2019.03.
159.	一山昂平・光枝健・加藤和利, テラヘルツパルス無線通信に向けた光パルス列繰り返し周波数増大, 電子情報通信学会総合大会大会2019, 2019.03.
160.	山内健太・西山七海・周洋・伊藤弘・石橋忠夫・加藤和利, アレーフォトミキサで生成したテラヘルツ波のビームステアリング角の検討, 電子情報通信学会総合大会大会2019, 2019.03.
161.	Ming Che, Takeshi Kuboki, and Kazutoshi Kato, Mitigating nonlinearity for VLC with CAP modulation, ICEVLC2019, 2019.03.
162.	Hao CHEN, Kazutoshi KATO, Nonlinear Modeling and Measurement for Tens of Gigahertz Electrical Amplifier in High-baud Multi-level Modulated Coherent Optical System, Research Reports on Information Science and Electrical Engineering of Kyushu University, 2019.01.
163.	光枝健・一山昂平・加藤和利, 変換によるテラヘルツ波パルス生成法の検討, 電子情報通信学会光エレクトロニクス研究会エレクトロニクス研究会12月研究会, 2018.12.
164.	福田浩規・河野隼太・久保木猛・加藤和利, 非線形モデルを用いた分布活性DFBレーザの波長切替高速化, 電子情報通信学会光エレクトロニクス研究会エレクトロニクス研究会12月研究会, 2018.12.
165.	河野隼太・福田浩規・久保木猛・加藤和利, 高速かつ高信頼な光スイッチを目指したDFBレーザの波長切替手法の検討, 電子情報通信学会光エレクトロニクス研究会エレクトロニクス研究会12月研究会, 2018.12.
166.	加藤和利, フォトミキサアレーによる高機能テラヘルツ波の発生, 応用物理学会テラヘルツ電磁波技術研究会第1回研究討論会, 2018.11.
167.	加藤和利・金谷晴一, フォトミキサアレーを用いたテラヘルツ波発生と無線通信への応用, 月刊オプトロニクス, 2018.11.
168.	Ming Che, Takeshi Kuboki, and Kazutoshi Kato, Adaptive Equalizer Based on Sign-Data LMS for Carrierless Amplitude and Phase Modulation in Multipath Visible Light Communication, MOC2018, 2018.10.
169.	Hiroki Fukuda, Shunta Kono, Takeshi Kuboki and Kazutoshi Kato, Wavelength Switching Method Accounting for Nonlinearity of Tunable Distributed Amplification DFB laser, MOC2018, 2018.10.
170.	Younjin Kim, Takeshi Kuboki and Kazutoshi Kato, Monolithically Integrated Photonics Device for Terahertz Wave Generation, MOC2018, 2018.10.
171.	Yang Zhou, Nanami Nishiyama, Hiroshi Ito, Tadao Ishibashi and Kazutoshi Kato, 700-GHz Terahertz Wave Beam Combination by Optical Phase Control, MOC2018, 2018.10.
172.	Ken Mitsueda, Muhammad Imran, and Kazutoshi Kato, 300-GHz-Repetition Optical Pulse Generation and Measurement for Terahertz Pulse Wave Communication, MOC2018, 2018.10.
173.	Takeshi Kuboki, Ryo Takigawa, and Kazutoshi Kato, Analysis of Adhesive Layer for Lithium Niobate-on-insulator Waveguides on Silicon Wafer with Room-temperature Bonding Method, MOC2018, 2018.10.
174.	周洋・西山七海・伊藤弘・石橋忠夫・加藤和利, 700GHzコヒーレントテラヘルツ波の空間合波, 電子情報通信学会ソサイエティ大会2018, 2018.09.
175.	加藤和利, 通信用デバイス技術によるテラヘルツ波発生, 電子情報通信学会ソサイエティ大会2018, 2018.09.
176.	光枝健・ムハマッドイムラン・加藤和利, テラヘルツ波パルス生成システムの検討, 電子情報通信学会ソサイエティ大会2018, 2018.09.
177.	郷原誠鷹・久保木猛・加藤和利, フォトミキシング技術を用いたテラヘルツ波帯2f検波の提案, 電子情報通信学会ソサイエティ大会2018, 2018.09.
178.	木村凌河・久保木猛・加藤和利, 波長可変レーザの400GHz(3.2nm)幅高速高安定波長切替, 電子情報通信学会ソサイエティ大会2018, 2018.09.
179.	福田浩規・河野隼太・久保木猛・加藤和利, 分布活性DFBレーザの単一モデル化による波長切替高速化, 電子情報通信学会ソサイエティ大会2018, 2018.09.
180.	Shunta Kono, Hiroki Fukuda, Takeshi Kuboki and Kazutoshi Kato, Proposal of Wavelength Control Method at DFB Laser for Fast and Reliable Wavelength Switching, 電気・情報関係学会九州支部第71回連合大会, 2018.09.
181.	Nanami Nishiyama, Zhou Yang, Gouki Sakano, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, 600 GHz Wave Combiner Using Arrayed Photomixer, PIERS2018, 2018.08.
182.	Yuta Naito, Yusuke Yamanaka, Nanami Nishiyama, Kazutoshi Kato, THz-wave Beam Steering by Utilizing Photomixing and Chromatic Dispersion of Two Lightwaves, PIERS2018, 2018.08.
183.	Kazutoshi Kato, Photonics Integrated Circuit for High-power Coherent THz Generation, PIERS2018, 2018.08.
184.	Ming Che, Takeshi Kuboki, and Kazutoshi Kato, Opportunities and Challenges for Smart LED Light Bulbs: Illumination, Communication, Indoor Positioning and Energy Harvesting, PIERS2018, 2018.08.
185.	Ming Che, Takeshi Kuboki, and Kazutoshi Kato, Dimmable Optical OFDM Based on Discrete Hartley Transform for Indoor Visible Light Illumination and Communication, OECC2018, 2018.07.
186.	山中友輔・久保木猛・加藤和利, 半導体光増幅器の相互利得変調を用いた光－無線メディア変換法の伝送性能向上の検討, 電子情報通信学会論文誌C, 2018.04.
187.	河野隼太・福田浩規・久保木猛・加藤和利, DFBレーザの高速かつ高信頼な波長安定化を目指した注入電流及び温度連携制御, 電子情報通信学会光エレクトロニクス研究会, 2018.04.
188.	西山七海・周洋・坂野豪紀・伊藤弘・石橋忠夫・加藤和利, 600GHz帯における入力光位相調整によるテラヘルツ波ビームステアリング, 電子情報通信学会光エレクトロニクス研究会, 2018.04.
189.	内藤裕太・西山七海・山中友輔・加藤和利, 光デバイスの波長分散特性を利用したテラヘルツ波ビームステアリング, 電子情報通信学会光エレクトロニクス研究会, 2018.04.
190.	Yang Zhou, Goki Sakano, Yusuke Yamanaka, Hiroshi Ito, Tadao Ishibashi, Kazutoshi Kato, 600-GHz-wave beam steering by terahertz-wave combiner, Optical Fiber Communication Conference, OFC 2018, 2018.01, We achieved 600-GHz-wave power combination with directional gain by optically phase tuning of arrayed photomixers. Using this phase control technique for phase shift, we also demonstrated the beam steering within an angle of 35 degrees..
191.	Hiroki Fukuda, Kenta Yamaguchi, Takeshi Kuboki, Kazutoshi Kato, Fast wavelength stabilization of tunable laser after starting laser oscillation, 22nd Microoptics Conference, MOC 2017, 2017.11, For fast wavelength switching within the full available wavelength range of the tunable laser array, we investigated a wavelength stabilizing method after switching on the injection current to the laser's active layer. Experimental results demonstrated that our feedback controller dramatically reduced wavelength switching time from 800 μs to 2.0 μs..
192.	Masataka Gohara, Ryoga Kimura, Kenta Yamaguchi, Takeshi Kuboki, Kazutoshi Kato, Linearizer for wavelength sweep at tunable DBR-LD and linearity evaluation of sweep, 22nd Microoptics Conference, MOC 2017, 2017.11, We constructed the linear wavelength sweeping system with 2-μm-band distributed Bragg reflector laser for the second-harmonic-detection wavelength modulation spectroscopy. Using our devised linearity evaluation method with a germanium etalon filter, we experimentally confirmed that the nonlinearity of the laser can be efficiently compensated..
193.	Ken Mitsueda, Yusuke Yamanaka, Kazutoshi Kato, Novel measurement method for optical pulse width at high-repetition frequency, 22nd Microoptics Conference, MOC 2017, 2017.11, We propose a measurement method of the optical pulse width at high-repetition frequencies. It consists of simple components such as a self-delayed interferometer and an optical power meter. We generated 50-GHz repetition pulses by superposing several lightwaves with 50-GHz spacing, and measured their pulse width with this measurement system..
194.	Yusuke Yamanaka, Younjin Kim, Takeshi Kuboki, Kazutoshi Kato, Optical-to-wireless media conversion by utilizing cross gain modulation at semiconductor optical amplifier, 22nd Microoptics Conference, MOC 2017, 2017.11, We devise an optical-to-wireless media conversion method by XGM at the SOA aiming for a future use at a THz-wave access. We investigate the XGM characteristics and the performance of our proposed media conversion method. We configure the media-converted data transmission system and demonstrate an error free transmission..
195.	Ming Che, Takeshi Kuboki, Kazutoshi Kato, Proposal of cost-efficient and low-complexity platform for software defined visible light communication, 22nd Microoptics Conference, MOC 2017, 2017.11, With the increasing popularity of LED lighting and a growing demand for bandwidth in wireless communication, the visible light communication (VLC) is one of the promising scheme for addressing the bottleneck in the emerging broadband access networks. For research in the field of VLC focused on solutions of contradiction between massive available bandwidth and limited modulation bandwidth of LED, the purpose of this paper is to design an VLC experiment platform with characteristics of high flexibility and rapid productization. As a result, this platform not only expand the concept of software defined communication, but has the advantage of simple structure and low cost..
196.	Yang Zhou, Goki Sakano, Kota Tsugami, Haruichi Kanaya, Kazutoshi Kato, Terahertz wave beam steering by optical phase control, 22nd Microoptics Conference, MOC 2017, 2017.11, We investigated the ability to tilt the terahertz wave beam at arrayed photomixers. Experimental demonstration showed that optical phase control enabled us to make a beam steering of a 300-GHz terahertz wave in a range of 25 degrees..
197.	Goki Sakano, Jun Haruki, Kota Tsugami, Haruichi Kanaya, Kazutoshi Kato, 4 × 4 Arrayed THz-wave combiner composed of UTC-PDs and slot antennas, 2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017, 2017.07, We have previously proposed a synchronous THzwave combiner with linearly arrayed power sources. With four arrayed photomixers we experimentally confirmed directional gain of 5.9 dB. In this paper, for exerting full performance of the array effect, we configured for the first time two-dimensionally arrayed THz-wave combiner and demonstrated a power gain of 4.8 dB compared to the linear array..
198.	Younjin Kim, Yusuke Yamanaka, Kazutoshi Kato, Demonstration of novel media conversion method from optical to THz-wave networks, 2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017, 2017.07, We propose optical-to-THz-wave conversion method using the cross-gain modulation and photomixing. In this method, signals on one wavelength are converted to those on two wavelengths which result in signals on THz wave after photomixing. We experimentally demonstrate the feasibility of seamless media conversion from a lightwave for optical communication into a 300-GHz carrier for wireless..
199.	Yusuke Yamanaka, Takeshi Kuboki, Kazutoshi Kato, Proposal of THz Phase Control System Utilizing Chromatic Dispersion at Optical Device and Its Feasibility Demonstration, 2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017, 2017.07.
200.	光枝健, 藤村勇起, 山中友輔, 加藤和利, 高繰り返し光パルスのパルス幅評価法の検討, 2017年電子情報通信学会総合大会, 2017.03.
201.	福田浩規, 木村凌河, 山口健太, 久保木猛, 加藤和利, 分布活性DFBレーザの活性層電流注入時の波長変化特性評価, 2017年電子情報通信学会総合大会, 2017.03.
202.	郷原誠鷹, 木村凌河, 山口健太, 久保木猛, 下小園真, 石井啓之, 加藤和利, 非線形電流掃引回路によるDBRレーザの波長掃引線形性の向上, 2017年電子情報通信学会総合大会, 2017.03.
203.	Abdulaziz E. El-Fiqi, Hossam M H Shalaby, Kazutoshi Kato, Impact of linear mode-coupling on nonlinear performance of long-haul strong-coupled multicore fibers transmission, 29th IEEE Photonics Conference, IPC 2016, 2017.01, We adapt Gaussian-noise (GN) model to evaluate the nonlinear performance of strong-coupled multicore fibers (MCFs) transmission. An expression for the nonlinear interference is obtained taking into account the linear mode-coupling. Our results show that linear mode-coupling can mitigate the nonlinearity effect in MCFs..
204.	Haruichi Kanaya, Masahiko Koga, Kota Tsugami, Guan Chai Eu, Kazutoshi Kato, 4x4 planar array antenna on indium phosphide substrate for 0.3-THz band application, 2017 Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII Conference, 2017.01, This paper presents a design and fabrication of 4 × 4 one-sided directional slot array antenna on indium phosphide (InP) substrate for 0.3 THz (300 GHz) wireless link. The antenna has top antenna metal layer and bottom floating metal layer. Polyimide dielectric layer is stacked between each metal layer. The antenna is placed on the deep etched InP substrate. By optimizing the length of the bottom floating metal layer, one-sided directional radiation can be realized. The branched coplanar wave guide (CPW) transmission line is connected to each antenna element with the same electrical length. The size of the 4 × 4 array antenna is 2,730 μm x 3,000 μm with uni-traveling-carrier photodiodes, DC bias and ground lines. Simulated realized gain in peak direction of the proposed antenna is 11.7 dBi. The transmission measurement is carried and measured received power..
205.	Abdulaziz E. El-Fiqi, Ahmed E. Morra, Hossam M.H. Shalaby, Salah S.A. Obayya, Kazutoshi Kato, Performance evaluation of hybrid DBPSK-MPPM technique in long-haul optical transmission, 2016 Conference on Lasers and Electro-Optics, CLEO 2016, 2016.12, The performance of DBPSK-MPPM technique is evaluated in long-haul transmission using GN-model. The BER expression is extended to address fiber nonlinearity. Results show that fiber nonlinearity effects are more significant in DBPSK-MPPM than traditional ones..
206.	Kenta Yamaguchi, Yudai Tatsumoto, Ryoga Kimura, Takeshi Kuboki, Kazutoshi Kato, Sub-millisecond wavelength switching of tunable DFB laser array (TLA) with injection current control, 2016 International Semiconductor Laser Conference, ISLC 2016, 2016.12, For the purpose of sub-millisecond wavelength switching, the feedforward current control technique was applied to the DFB laser. At the switching from 191.2 THz to 191.0 THz, our designed controller successfully reduced the wavelength switching time of the tunable DFB laser array down to 800 μs..
207.	山中友輔, 坂野豪紀, 春木隼, 久保木猛, 加藤和利, 光導波路型デバイスの波長分散測定法の検討と波長分散変化を用いたテラヘルツ波位相調整, 電子情報通信学会マイクロ波・ミリ波フォトニクス研究会, 2016.11.
208.	春木隼, 坂野豪紀, 佐熊一輝, 加藤和利, 犬伏祐樹, 藤田悠介, 久武信太郎, 永妻忠夫, First demonstration of 300-GHz band wireless transmission with arrayed photomixer, 2016年電子情報通信学会ソサイエティ大会, 2016.10.
209.	坪井淳, Takeshi Kuboki, Kazutoshi Kato, Optical frequency stabilization within ±20MHz of distributed feedback laser controlled by novel feedback algorithm, 21st Microoptics Conference, 2016.10.
210.	春木隼, 坂野豪紀, 佐熊一輝, 加藤和利, 犬伏祐樹, 藤田悠介, 久武信太郎, 永妻忠夫, First demonstration of 300-GHz band wireless transmission with arrayed photomixer, 21st Microoptics Conference, 2016.10.
211.	木村凌河, 立本雄大, 恩地裕和, Takeshi Kuboki, Kazutoshi Kato, Internal-wavelength-locker based feedforward/feedback co-operative wavelength control for 100 ns wavelength switching, 21st Microoptics Conference, 2016.10.
212.	藤村勇起, 中村諒平, Takeshi Kuboki, Kazutoshi Kato, Wavelength Selective Filter Based Mach-Zernder Interferometric Phase Stabilization for High-Frequency Carrier Generation, 21st Microoptics Conference, 2016.10.
213.	Goki Sakano, Jun Haruki, Kazuki Sakuma, Kazutoshi Kato, 4-channel synchronous THz-wave generatorcomposed of arrayed UTC-PDs and antennas, 21st OptoElectronics and Communications Conference, OECC 2016 - Held Jointly with 2016 International Conference on Photonics in Switching, PS 2016, 2016.10, We configured THz wave generator consistiong of four-channel arrayed photomixers/antennas. We demonstrated that the powers are combined with the directional gain of 5.9 dB and proportional to the square of the number of photomixers..
214.	Yusuke Yamanaka, Yuki Fujimura, Kazutoshi Kato, Demonstration of controlling chromatic dispersion at SOA with Mach-Zehnder interferometric measurement system, 21st OptoElectronics and Communications Conference, OECC 2016 - Held Jointly with 2016 International Conference on Photonics in Switching, PS 2016, 2016.10, We proposed the Mach-Zehnder interferometric system to measure the chromatic dispersion at an optical device. We demonstrated that the phase difference between two lightwaves can be controlled at the SOA with our system..
215.	山中友輔, Takeshi Kuboki, 加藤和利, マッハ・ツェンダ干渉計型強度変調法による半導体位相変調器の波長分散測定, 2016年電子情報通信学会ソサイエティ大会, 2016.09.
216.	山口健太, 木村凌河, 立本雄大, Takeshi Kuboki, 加藤和利, DFBレーザの注入電流制御によるサブミリ秒波長切替, 2016年電子情報通信学会ソサイエティ大会, 2016.09.
217.	坂野豪紀, 春木隼, 佐熊一輝, 加藤和利, フォトミキサアレイを用いたコヒーレントテラヘルツ波合成－アレイ数とテラヘルツ波ピーク強度の対応関係－, 2016年電子情報通信学会ソサイエティ大会, 2016.09.
218.	坪井淳, Takeshi Kuboki, 加藤和利, 制御パラメータ可変化によるDFB-LD周波数安定制御の高精度化, 2016年電子情報通信学会ソサイエティ大会, 2016.09.
219.	春木隼, 坂野豪紀, 佐熊一輝, 加藤和利, 犬伏祐樹, 藤田悠介, 久武信太郎, 永妻忠夫, フォトミキサアレイを用いた空間電力合成による300GHz帯無線伝送実験, 2016年電子情報通信学会ソサイエティ大会, 2016.09.
220.	キムヨンジン, 加藤和利, Optical Design of Evanescently Coupled Photodiode for Terahertz Wave Generation, 平成28年度電機・情報関係学会九州支部連合大会国際セッション, 2016.09.
221.	木村凌河, 立本雄大, 佐熊一輝, 恩地裕和, Takeshi Kuboki, 加藤和利, フィードフォワード/フィードバック併用型制御の提案とこれを用いた波長可変レーザの高速波長切替の実現, 平成28年度電機・情報関係学会九州支部連合大会, 2016.09.
222.	坂野豪紀, 春木隼, 佐熊一輝, 加藤和利, 4-Channel Synchronous THz-wave Generator Compoased of Arrayed UTC-PDs and Antennas, OECC/PS 2016, 2016.07.
223.	山中友輔, 藤村勇起, 加藤和利, Demonstration of Controlling Chromatic Dispersion at SOA with Mach-Zehnder Interferometric Measurement System, OECC/PS 2016, 2016.07.
224.	坂野豪紀, 春木隼, 佐熊一輝, 加藤和利, フォトミキサアレイによるコヒーレントテラヘルツ波合成, 電子情報通信学会光エレクトロニクス研究会, 2016.04.
225.	山口健太, 木村凌河, 立本雄大, 久保木猛, 加藤和利, 光通信用DFBレーザの注入電流制御による波長切替高速化, 電子情報通信学会光エレクトロニクス研究会, 2016.04.
226.	山中友輔, 藤村勇起, 加藤和利, マッハ・ツェンダ干渉計を用いた光デバイスの波長分散測定, 電子情報通信学会光エレクトロニクス研究会, 2016.04.
227.	Haruichi Kanaya, Tomoki Oda, Naoto Iizasa, Kazutoshi Kato, 300 GHz one-sided directional slot array antenna on indium phosphide substrate, International Symposium on Antennas and Propagation, ISAP 2015, 2016.04, This paper presents a novel design of 300 GHz band 1 × 4 one-sided directional slot dipole array antenna fed by coplanar waveguide (CPW) on indium phosphide (InP). The proposed antenna has four antenna elements and branched CPW structure to achieve a high antenna gain and a sharp beam. We fabricated and measured the array antenna. In the EM simulation, forward directional peak gain is 7.35 dBi. The measured reflection coefficient is agreed with the simulation results..
228.	木村凌河, 立本雄大, 佐熊一輝, 恩地裕和, 下小園真, 石井啓之, 加藤和利, モジュール内蔵汎用波長ロッカによる波長可変レーザの110ns高速波長切替, 2016年電子情報通信学会総合大会, 2016.03.
229.	山口健太, 立本雄大, 木村凌河, 久保木猛, 加藤和利, フィードフォワード制御による光通信用DFBレーザの波長切替時間の短縮, 2016年電子情報通信学会総合大会, 2016.03.
230.	坪井淳, 三井晨太郎, 久保木猛, 加藤和利, 高精度広キャプチャレンジDFB-LD波長安定化制御, 2016年電子情報通信学会総合大会, 2016.03.
231.	山中友輔, 藤村勇起, 中村瞭平, 加藤和利, マッハ・ツェンダ干渉型相対波長分散測定法の提案と光デバイスの相対波長分散特性, 2016年電子情報通信学会総合大会, 2016.03.
232.	藤村勇起, 佐熊一輝, 武内翔太, 加藤和利, 久武信太郎, 永妻忠夫, 平面光波回路を用いた光位相制御による低雑音高周波キャリア生成, 2016年電子情報通信学会総合大会, 2016.03.
233.	春木隼, 佐熊一輝, 坂野豪紀, 加藤和利, 位相調整光回路によるコヒーレントテラヘルツ波合成, 2016年電子情報通信学会総合大会, 2016.03.
234.	坂野豪紀, 春木隼, 佐熊一輝, 加藤和利, フォトミキサアレイを用いた高指向性利得多チャンネルコヒーレントテラヘルツ波合成, 2016年電子情報通信学会総合大会, 2016.03.
235.	三井晨太郎, 坪井淳, 久保木猛, 加藤和利, 基準光とのビート信号直接計数によるDFBレーザの高精度波長安定化, 2016年電子情報通信学会総合大会, 2016.03.
236.	中村瞭平, 藤村勇起, 久保木猛, 加藤和利, 波長選択フィルタを用いたマッハ・ツェンダ型二光波位相安定化法によるキャリア周波数生成, 2016年電子情報通信学会総合大会, 2016.03.
237.	Kazuki Sakuma, Yuki Fjimura, Shota Takeuchi, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, Coherent THz Power Combiner Consisting of Arrayed Uni-Traveling Carrier Photodiodes and Planar Lightwave Circuit, SPIE Photonics West 2016, 2016.02.
238.	Yuki Fujimura, Kazuki Sakuma, Shota Takeuchi, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, Compact and robust phase stabilization system for high-frequency carrier generation using an integrated lightwave circuit, 20th Microoptics Conference, MOC 2015, 2016.02, We devise an integrated lightwave circuit for the Mach-Zehnder Interferometric phase stabilization in a high-frequency carrier generation. With this integrated-circuit-based system, we demonstrate a data transmission with 1-Gbit/s binary phase-shift keying at the carrier frequency of 12.5 GHz..
239.	Ryoga Kimura, Yudai Tatsumoto, Kazuki Sakuma, Hirokazu Onji, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, Fast wavelength stabilization of tunable lasers with the internal wavelength locker, 20th Microoptics Conference, MOC 2015, 2016.02, The wavelength control system with the internal wavelength locker of the tunable lasers is configured so as to accelerate the wavelength detection speed. With this control system the wavelength is stabilized within 3.8 μs after wavelength switching which is even faster than that with the conventional control system..
240.	Jun Haruki, Kazuki Sakuma, Kazutoshi Kato, Synchronous THz wave combiner consisting of arrayed photomixers, 20th Microoptics Conference, MOC 2015, 2016.02, We propose a power combiner of the synchronous terahertz waves for generating a higher coherent terahertz output power. The combiner consists of arrayed photomixers with bowtie-antennas. The experimental results show terahertz waves synchronized by the combiner results sum of the powers from photomixers and the directional gain of about 2 dB..
241.	Jun Tsuboi, Takeshi Kuboki, Kazutoshi Kato, Wavelength stabilization within 0.05 GHz with photo-mixing technique and laser current controlling, 20th Microoptics Conference, MOC 2015, 2016.02, The lasers for the WDM system with the flexible grid need to have highly accurate wavelength tuning and stability. Instead of using optical filters, we propose the microwave photonics approach with photo-mixing technique and the laser current controlling. Experimental results show that the optical frequency is stabilized with the accuracy of 0.05GHz..
242.	加藤和利, コヒーレントテラヘルツ波発生用光電子デバイス技術, レーザー学会学術講演会第36回年次大会, 2016.01.
243.	Haruichi Kanaya, Tomoki Oda, Naoto Iizasa, Kazutoshi Kato, Planar array antenna with director on indium phosphide infstrate for 300GHz wireless link, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, 2016.01, This paper presents a design and fabrication of 1 x 4 one-sided directional slot array antenna with director metal layer on indium phosphide (InP) infstrate for 300 GHz wireless link. The floating metal and polyimide dielectric layer are stacked on InP. Antenna is designed on the top metal layer. By optimizing the length of the bottom floating metal layer, one-sided directional radiation can be realized. The branched coplanar wave guide (CPW) transmission line is connected to each antenna element with the same electrical length. The size of the 1 x 4 array antenna is 2,550 μm x 1,217 μm x 18 μm. In order to enhance the gain of forward direction, director metal layer is placed over 83 μm from top metal layer. Simulated realized gain in peak direction of our antenna is 9.23 dBi. The measured center frequency is almost the same as that of the simulation results..
244.	立本雄大, 木村凌河, 下小園真, 石井啓之, 加藤和利, フィードフォワード制御による波長可変レーザの波長切替高速化, 電子情報通信学会光エレクトロニクス研究会, 2015.12.
245.	K. Sakuma, S. Takeuchi, Y. Fujimura, J. Haruki, Kazutoshi Kato, S. Hisatake, T. Nagatsuma, First demonstration of Mach-Zehnder-interferometric phase-stabilization at optoelectronic carrier generation for phase-shift keying signal, Opto-Electronics and Communications Conference, OECC 2015, 2015.11, We devised a phase stabilization technique at optoelectronic carrier generation applicable for the future THz wireless coherent transmission. Based on a 1-Gbit/s data transmission with a 12.5-GHz carrier signal, we demonstrate for the first time that our technique using a Mach-Zehnder interferometric configuration is effective not only for on-off keying signals, but also for phase-shift keying signals..
246.	Y. Tatsumoto, H. Onji, R. Kimura, Kazutoshi Kato, H. Ishi, M. Simokozono, High-speed, high-accuracy 400-GHz wavelength switching at tunable distributed amplification (TDA-) DFB laser using feedforward control, Opto-Electronics and Communications Conference, OECC 2015, 2015.11, We present the method of the high-speed wavelength switching of the tunable distributed amplification (TDA-) DFB laser by feedforward control. We designed and simulated the feedforward controller to accelerate the wavelength switching. A switching time of less than 100 ns with a frequency deviation of less than 1 GHz was achieved at switching toward 400-GHz spaced channels. The results indicate the feasibility of the TDA-DFB laser for future wavelength routing systems..
247.	Ryoga Kimura, Yudai Tatsumoto, Kazuki Sakuma, Hitrokazu Onji, Makoto Shimokozono, Hiroyuki Ishii, Fast Wavelength Stabilization of Tunable Lasers with the Internal Wavelength Locker, 20th Microoptics Conference (MOC’15), 2015.10, The wavelength control system with the internal wavelength locker of the tunable lasers is configured so as to accelerate the wavelength detection speed. With this control system the wavelength is stabilized within 3.8 µs after wavelength switching which is even faster than that with the conventional control system..
248.	Jun Haruki, Kazuki Sakuma, Kazutoshi Kato, SYNCHRONOUS THZ WAVE COMBINER CONSISTING OF ARRAYED PHOTOMIXERS, 20th Microoptics Conference (MOC’15), 2015.10, We propose a power combiner of the synchronous terahertz waves for generating a higher coherent terahertz output power. The combiner consists of arrayed photomixers with bowtie-antennas. The experimental results show terahertz waves synchronized by the combiner results sum of the powers from photomixers and the directional gain of about 2 dB..
249.	Jun Tsuboi, Takeshi Kuboki, Kazutoshi Kato, WAVELENGTH STABILIZATION WITHIN 0.05 GHz WITH PHOTOMIXING TECHNIQUE AND LASER CURRENT CONTROLLING, 20th Microoptics Conference (MOC’15), 2015.10, The lasers for the WDM system with the flexible grid need to have highly accurate wavelength tuning and stability. Insteadof using optical filters, we propose the microwave photonics approach with photo-mixing technique and the laser current controlling. Experimental results show that the optical frequency is stabilized with the accuracy of 0.05GHz.
250.	Tadao Nagatsuma, Kazutoshi Kato, Jeffrey Hesler, Enabling technologies for real-time 50-Gbit/s wireless transmission at 300 GHz, 2nd ACM International Conference on Nanoscale Computing and Communication, ACM NANOCOM 2015, 2015.09, There has been a growing interest in the application of terahertz (THz) waves to broadband wireless communications. Particularly, use of THz waves at frequencies above 275 GHz is one of the big concerns among researchers, because these frequency bands have not yet been allocated for specific active services, and there is a possible opportunity to utilize extremely large bandwidths for ultra-broadband wireless communications. In this paper, we describe photonics-based approaches to realizing most practical and robust 300-GHz-band wireless links to meet and explore realworld applications at the earliest opportunity as a technology driver. We present enabling technologies for a real-time 50-Gbit/s transmission at over 20-m distance..
251.	Yudai Tatsumoto, Ryoga Kimura, Hirokazu Onji, Kazutoshi Kato, Hiroyuki Ishii, Makoto Shimokozono, High-speed, High-Accuracy 400-GHz Wavelength Switching at Tunable Distributed Amplification (TDA-) DFB Laser using Feedforward Control, 20th Optoelectronics and Communications Conference, 2015.07, We present the method of the high-speed wavelength switching of the tunable distributed amplification (TDA-) DFB laser by feedforward control. We designed and simulated the feedforward controller to accelerate the wavelength switching. A switching time of less than 100 ns with a frequency deviation of less than 1 GHz was achieved at switching toward 400-GHz spaced channels. The results indicate the feasibility of the TDA-DFB laser for future wavelength routing systems..
252.	Kazuki Sakuma, Shota Takeuchi, Yuki Fujimura, Jun Haruki, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, First Demonstraion of Mach-Zehnder-Interferometric Phase-Stabilizaion at Optoelectronic Carrier Generation for Phase-Shift Keying Signal, 20th Optoelectronics and Communications Conference, 2015.06, We devised a phase stabilization technique at optoelectronic carrier generation applicable for the future THz wireless transmission. In this presentation we demonstrate at the first time that our technique using a Mach-Zehnder interferometric configuration is effective for the optoelectronic carrier for phase-shift keying signals as well as that for on-off keying signals by using an 1-Gbit/s binary-phase-shift keying transmission on a 12.5-GHz optoelectronic carrier..
253.	Atsushi Saeki, Kazutoshi Kato, Fine wavelength stabilization of the DFB laser by photo-mixing with reference wavelengths, The Third International Japan-Egypt Conference on Electronics, Communications and Computers, March 17, 2015, 2015.03, The lasers for the future WDM system such as the flexible grid need to have highly accurate wavelength tuning which corresponds to the optical frequency stability within ±0.1 GHz. Instead of the use of the conventional wavelength locker which detects the optical frequency with optical filters, we propose the microwave photonics approach in which the beat signals are generated by photo-mixing with reference lights and filtered by the microwave filter. In this method the frequency accuracy depends on the accuracy of the microwave filter. Experimental results show that the optical frequency is stabilized at the grid with the accuracy of ±0.1 GHz by using the microwave filter..
254.	Kazuki Sakuma, Shota Takeuchi, Yuki Fujimura, Jun Haruki, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, Mach-Zehnder Interferometric Phase Stabilization for Optoelectronic Carrier Generation, The Third International Japan-Egypt Conference on Electronics, Communications and Computers, March 17, 2015, 2015.03, We present a phase stabilization system of optoelectronic carrier generation for the future THz wireless transmission. The system has a Mach-Zehnder interferometric configuration and we transmitted 1-Gbit/s data at a 12.5-GHz carrier to confirm the effectiveness of the concept. We found that the noise floor which had been observed at the BER characteristics in our previous work disappeared with an optimized control and attained an error free performance..
255.	藤村勇起, 佐熊一輝, 武内翔太, 加藤和利, 久武信太郎, 永妻忠夫, マッハ・ツェンダ干渉計型二光波間位相安定化法によるPSK変調キャリアの位相雑音低減, 2015年電子情報通信学会総合大会C14-10, 2015.03, マッハ・ツェンダ干渉計型二光波間位相安定化法によるPSK変調キャリアの位相雑音低減.
256.	春木隼, 武内翔太, 佐熊一輝, 加藤和利, 久武信太郎, 永妻忠夫, UTC-PDアレイと光位相調整器によるコヒーレントテラヘルツ波発生デバイスの試作, 2015年電子情報通信学会総合大会C4-14, 2015.03, UTC-PDアレイと光位相調整器によるコヒーレントテラヘルツ波発生デバイスの試作.
257.	加藤和利, 木村凌河, 立本雄大, 佐熊一輝, 恩地裕和, モジュール内蔵波長ロッカを用いたフィードバック制御による TDA-DFBレーザの高速波長切替, 2015年電子情報通信学会総合大会C4-22, 2015.03, モジュール内蔵波長ロッカを用いたフィードバック制御による TDA-DFBレーザの高速波長切替.
258.	Atsushi Saeki, Kazutoshi Kato, Fine wavelength stabilization of the DFB laser at the flexible grid by photo-mixing with reference wavelengths, 2014 Asia-Pacific Microwave Conference (APMC) 2014, FG1G-43, Sendai, 2014, 2014.11, The lasers for the flexible grid need to have highly accurate wavelength tuning which corresponds to the optical frequency stability within ±0.1 GHz. Instead of the use of the conventional wavelength locker which detects the optical frequency with optical filters, we propose the microwave photonics approach in which the beat signals are generated by photo-mixing with reference lights and filtered by the microwave filter. In this method the frequency accuracy depends on the accuracy of the microwave filter. Experimental results show that the optical frequency is stabilized at the grid with the accuracy of ±0.1 GHz by using the band elimination filter which has the 3-dB bandwidth of 0.1 GHz..
259.	Shota Takeuchi, Kazutoshi Kato, Y.Yoshimizu, Y. Yasuda, Shintaro Hisatake, Tadao Nagatsuma, Coherent Sub-THz Carrier Frequency Transmission with Novel Pseudo-Mach-Zehnder Interferometric Phase Stabilization, 2014 International Topical Meeting on Microwave Photonics (MWP) 2014, TuEF-1, Sapporo, 2014, 2014.10.
260.	恩地裕和, 立本雄大, 武内翔太, 布谷伸浩, 下小園真, 石井啓之, 加藤和利, フィードフォワード制御を用いた波長可変レーザの波長切替応答高速化に関する研究, 信学技報, vol. 114, no. 282, OPE2014-92, pp. 33-36, 2014年10月, 2014.10.
261.	恩地裕和, 立本雄大, 布谷伸浩, 下小園真, 石井啓之, 加藤和利, TDA-DFBレーザの波長切替応答高速化と切替応答の考察の検討, H26秋電子情報通信学会, 2014.09, 光バースト、光パケットシステムなどの波長ルーティングシステム発展のためには、より高速に波長切替可能な光源が必要となってくる。我々はこれまでに、制御層への電流変化により波長が変化するTDA(Tunable Distributed Amplifier) DFBレーザについて、フィードフォワード(FF)制御を導入することによってより、長波長ある波長安定状態から制御層電流を増加し短波長側(光周波数の増大方向制御層電流増加)への波長切替において応答高の速化を実現してきた[2]。本稿では短波長側への切替に加えて制御層電流を減少した長波長側(光周波数の増大方向) (制御層電流減少)への波長切替応答高速化を目指しについても、FF制御を導入することでそれぞれ波長切替時間35 ns、30 nsを実現したことと、切替応答について考察を行ったのでが高速化されたことについて報告する。.
262.	武内翔太, 加藤和利, 久武信太郎, 永妻忠夫, 疑似マッハ・ツェンダ干渉型二光波位相安定化による低位相雑音サブテラヘルツ波生成, 電子情報通信学会2014ソサイエティ大会, C-14-11., 2014.09.
263.	立本雄大, 恩地裕和, 武内翔太, 布谷伸浩, 下小園真, 石井啓之, 加藤和利, フィードフォワード制御によるTDA-DFBレーザの波長切替高速化と光スイッチ動作, 電子情報通信学会2014ソサイエティ大会, C-4-29, 2014.09, フィードフォワード制御によるTDA-DFBレーザの波長切替高速化と光スイッチ動作.
264.	恩地裕和, 立本雄大, 布谷伸浩, 下小園真, 石井啓之, 加藤和利, TDA-DFBレーザの波長切替応答高速化の検討, 電子情報通信学会2014ソサイエティ大会, C-4-28., 2014.09, TDA-DFBレーザの波長切替応答高速化の検討.
265.	佐熊一輝, 武内翔太, 布谷伸浩, 下小園真, 加藤和利, フィードフォワード/フィードバック切替型制御による波長可変レーザの高速波長安定化, 電子情報通信学会2014ソサイエティ大会, C-4-27, 2014.09, フィードフォワード/フィードバック切替型制御による波長可変レーザの高速波長安定化.
266.	佐伯淳, 加藤和利, 基準光との光差周波を用いた半導体レーザの高精度波長安定化, 電子情報通信学会2014ソサイエティ大会, C-4-18, 2014.09, 基準光との光差周波を用いた半導体レーザの高精度波長安定化.
267.	Hirokazu Onji, Yudai Tatsumoto, Kazutoshi Kato, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Stable Wavelength Switching within 50 ns using Tunable Distributed Amplification (TDA-) DFB Lasers, 2014.08, Aiming fast wavelength switching for the tunable distributed amplification (TDA-) DFB lasers, the transfer function is deduced from the transient response and then the feedforward controller is designed. Experimental results show that the wavelength can be accurately stabilized within 35 ns and 30 ns when the optical frequency changes from 192.8 THz to 193 THz and vice versa, respectively..
268.	Hirolazu Onji, Shota Takeuchi, Yudai Tatsumoto, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, 35 ns Wavelength Switching with +/- 1 GHz Wavelength Accuracy using Tunable Distributed Amplification(TDA-) DFB Lasers, Photonics in Switching, Advanced Photonics for Communications, WPW4B.3, San Diego, USA, 2014, 2014.07, For fast wavelength switching of TDA-DFB lasers, the feedforward controller is designed. Experimental results show switching times of 35 ns and 30 ns when the optical frequency changes from 192.8 THz to 193.0 THz and vice versa.
269.	Shota Takeuchi, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, Sub-THz Carrier Frequency Generation Stabilized by Mach-Zehnder Interferometric Phase Detection Scheme, 19th Microoptics Conference, 2014.06, We propose a Mach-Zehnder interferometric phase detection for low phase noise subterahertz(THz) carrier frequency generation. In this scheme, phase fluctuation between two optical signals can be detected as the interference between their optical sidebands. Experimental result shows that, by controlling the interference to be constant, the phase noise is successfully reduced, which indicates effectiveness of the proposed method..
270.	立本雄大, 恩地裕和, 武内翔太, 布谷伸浩, 下小園真, 石井啓之, 加藤和利, フィードフォワード制御によるTDA-DFBレーザの50 ns以下での波長切替, 電子情報通信学会総合大会, 2014.03, 光バーストシステムや光パケットシステムには波長可変範囲が広く高速波長切替が可能な光源が求められる。その候補の一つとしてTDA (Tunable Distributed Amplification）-DFBレーザが開発されている。熱ドリフト補償器を集積したTDA-DFBレーザでは波長切替時の熱ドリフトを抑制し0.31 usまでの高速波長切替が実現できている。我々はフィードフォワード制御により駆動回路の立ち上がり時間を高速化し、波長切替時間150 nsを実現した。本稿ではさらに高速な回路を設計し、それに適合したフィードフォワード制御によって波長切替時間50 ns以下を実現したので報告する。.
271.	佐熊一輝, 武内翔太, 布谷伸浩, 下小園真, 石井啓之, 加藤和利, 波長可変レーザの最適フィードバック制御パラメータ設計, 電子情報通信学会総合大会, 2014.03, 光バースト/パケットスイッチングの実現に向けて高速かつ高精度に波長切替可能な波長可変レーザ(TDA-DFBレーザ)の研究が行われている。我々はデジタル制御による複雑な系の安定化の実現可能性に注目し、フィードフォワード(FF)制御とフィードバック(FB)制御を組み合わせることでFBループ周期よりも高速に波長安定化できることを報告した。本稿では、波長可変レーザおよびその周辺回路を含むシステム全体の特性に基づいた最適なFB制御パラメータの設計とその検証を行ったので報告する。.
272.	Atsushi Saeki, Kazutoshi Kato, Fine wavelength stabilization of the DFB laser at the flexible grid by photo-mixing with reference wavelengths, 2014 Asia-Pacific Microwave Conference, APMC 2014, 2014.03, The lasers for the flexible grid need to have highly accurate wavelength tuning which corresponds to the optical frequency stability within ±0.1 GHz. Instead of the use of the conventional wavelength locker which detects the optical frequency with optical filters, we propose the microwave photonics approach in which the beat signals are generated by photo-mixing with reference lights and filtered by the microwave filter. In this method the frequency accuracy depends on the accuracy of the microwave filter. Experimental results show that the optical frequency is stabilized at the grid with the accuracy of ±0.1 GHz by using the band elimination filter which has the 3-dB bandwidth of 0.1 GHz..
273.	佐伯淳, 武内翔太, 恩地裕和, 加藤和利, 光差周波を用いたフレキシブルグリッド向け高精度レーザー波長安定化, レーザー学会, 2014.01, 光通信の大容量化に向けてフレキシブルグリッドが注目されている。フレキシブルグリッドでは6.25GHz間隔で配置された光周波数を中心に帯域粒度12.5GHzの任意の幅のスロットを配置できるため高密度な波長多重伝送が可能となるが、グリッド間隔が6.25GHzと狭いためレーザーには±0.1GHz以内の精度での波長安定化が必要となる。本研究では、フレキシブルグリッドから半周期ずらした基準光群と被測定光の差周波を波長誤差検出信号として用い、高精度にレーザーの波長を安定化する方法を検討した。.
274.	S. Takeuchi, Kazutoshi Kato, Y. Yoshimizu, Y. Yasuda, S. Hisatake, T. Nagatsuma, Coherent sub-THz carrier frequency transmission with novel pseudo-Mach-Zehnder interferometric phase stabilization, 2014 International Topical Meeting on Microwave Photonics, MWP 2014 and the 9th Asia-Pacific Microwave Photonics Conference, APMP 2014, 2014.01, We present a novel carrier-phase stabilization scheme for sub-THz communications. The scheme has a pseudo-Mach-Zehnder interferometric configuration in which two optical sidebands from an optical frequency comb travel along two different optical paths and then are coupled with each other. The interference between the optical frequencies generated from two sidebands are monitored and controlled to be constant, so that the phase noise of the generated sub-THz carrier is stabilized. Experimental results show an error-free (BER
275.	H. Onji, S. Takeuchi, Y. Tatsumoto, Kazutoshi Kato, N. Nunoya, M. Shimokozono, H. Ishii, Stable wavelength switching within 50 ns using tunable distributed amplification (TDA-) DFB lasers, 12th International Conference on Optical Internet, COIN 2014, 2014.01, Aiming fast wavelength switching for the tunable distributed amplification (TDA-) DFB lasers, the transfer function is deduced from the transient response and then the feedforward controller is designed. Experimental results show that the wavelength can be accurately stabilized within 35 ns and 30 ns when the optical frequency changes from 192.8 THz to 193 THz and vice versa, respectively..
276.	Mohammad Nasir Uddin, T. Kizu, Y. Hinokuma, K. Tanabe, A. Tajima, Kazutoshi Kato, Kiichi Hamamoto, First demonstration of high intrinsic modulation bandwidth (26.5 GHz) in active multimode interferometer laser diode by using split pumping configuration, 18th Microoptocs Conference (MOC'13), 2013.10.
277.	Shota Takeuchi, Hirokazu Onji, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, WAVELENGTH STABILIZATION OF TUNABLE LASERS BASED ON THERMAL-DRIFT CANCELER, 18th Microoptics Conference (MOC'13), 2013.10, The wavelength stabilization based on the digitally controlled thermal-drift canceler is proposed and experimentally demonstrated. The tunable distributed amplification (TDA-) DFB laser controlled by this canceler reaches the targeted wavelength within a microsecond and keeps it stably..
278.	Hirokazu Onji, Shota Takeuchi, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, ACCELERATION OF WAVELENGTH SWITCHING FOR TUNABLE DISTRIBUTED AMPLIFICATION (TDA-) DFB LASERS, 18th Microoptics Conference (MOC'13), 2013.10, The feedforward controller is designed and demonstrated to accelerate the wavelength switching for the tunable distributed (TDA) DFB lasers. The controller has an impulse overshoot waveform so as to induce prompt transition of short time phenomena. The controlled laser shows a wavelength switching time of 150 ns which shows effectiveness of the proposed technique..
279.	武内翔太, 恩地裕和, 布谷伸浩, 下小園真, 石井啓之, 加藤和利, デジタル制御熱ドリフト補償による波長可変レーザの波長安定化, 電子情報通信学会2013ソサイエティ大会, 2013.09, FF制御とFB制御を組み合わせた制御法を考案し、これをTDA-DFBレーザに適用した。実験により、熱ドリフトを補償することで320nsの高速な波長安定化を確認した。.
280.	恩地裕和, 武内翔太, 布谷伸浩, 下小園真, 石井啓之, 加藤和利, フィードフォワード制御によるTDA-DFBレーザの高速波長切替, 電子情報通信学会2013ソサイエティ大会, 2013.09, 波長切替高速化を目的にTDA-DFBレーザの波長切替特性のモデル化とフィードフォワード制御の設計を行った。実際に制御系を作製し波長切替150 nsを実現した。.
281.	Shogo Yagi, Kazunori Naganuma, Tadayuki Imai, Yasuo Shibata, Shigeo Ishibashi, Yuzo Sasaki, Masahiro Sasaura, Kazuo Fujiura, Kazutoshi Kato, A mechanical-free 150-kHz repetition swept light source incorporated a KTN electro-optic deflector, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV, 2011.04, We present a new light source for the swept-source OCT, that is, an external-cavity LD incorporating an electro-optic deflector. We use a KTN deflector that is unique in being very fast and simultaneously providing an appreciable deflection caused by injected carriers. Particularly, high-speed and nearly linear to the applied voltage operation is attained when KTN crystal is pre-charged. Our 1.3-μm Littman-Metcalf external-cavity laser exhibits static linewidth
282.	K. Kitayama, T. Kubo, R. Takahashi, S. Matsuo, S. Arakawa, M. Murata, M. Notomi, K. Nozaki, Kazutoshi Kato, All-optical RAM buffer subsystem demonstrator, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, OFC/NFOEC 2011, 2011.03, A comprehensive R&D program aiming at all-optical RAM buffer subsystem for optical packet switching will be presented, featuring nano-cavity based optical bit memory, a unique beam addressing optics, and optical SP and PS converters..
283.	N. Fujiwara, R. Yoshimura, Kazutoshi Kato, H. Ishii, F. Kano, Y. Kawaguchi, Y. Kondo, K. Ohbayashi, H. Oohashi, Single-mode 140 nm swept light source realized by using SSG-DBR lasers, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII, 2008.04, We demonstrate a single-mode and fast wavelength swept light source by using Superestrucuture grating distributed Bragg reflector (SSG-DBR) lasers for use in optical frequency-domain reflectometry optical coherence tomography. The SSG-DBR lasers provide single-mode operation resulting in high coherency. Response of the wavelength tuning is very fast; several nanoseconds, but there was an unintentional wavelength drift resulting from a thermal drift due to injecting tuning current. The dri¹ft unfortunately requires long time to converge; more than a few milliseconds. For suppressing the wavelength drift, we introduced Thermal Drift Compensation mesa (TDC) parallel to the laser mesa with the spacing of 20 μm. By controlling TDC current to satisfy the total electric power injected into both the laser mesa and the TDC mesa, the thermal drift can be suppressed. In the present work, we fabricated 4 wavelength's kinds of SSG-DBR laser, which covers respective wavelength band; S-band (1496-1529 nm), C-band (1529-1564 nm), L^--band (1564-1601 nm), and L⁺-band (1601-1639). We set the frequency channel of each laser with the spacing 6.25 GHz and 700 channels. The total frequency channel number is 2800 channels (700 ch × 4 lasers). We simultaneously operated the 4 lasers with a time interval of 500 ns/channel. A wavelength tuning range of more than 140 nm was achieved within 350 μs. The output power was controlled to be 10 mW for all channels. A single-mode, accurate, wide, and fast wavelength sweep was demonstrated with the SSG-DBR lasers having TDC mesa structure for the first time..
284.	N. Fujiwara, R. Yoshimura, Kazutoshi Kato, H. Ishii, Y. Kawaguchi, Y. Kondo, H. Oohashi, 70 nm fast wavelength sweep using SSG-DBR lasers, 2007 Conference on Lasers and Electro-Optics - Pacific Rim, CLEO/PACIFIC RIM, 2007.12, A quasi-continuous wavelength sweep range of 70 nm is achieved by utilizing thermal compensation in SSG-DBR lasers. The frequency spacing is set at 6.25 GHz, and the output power is 10 mW for the whole tuning range. Thermal drift compensation enhances wavelength accuracy, and realizes fast and stable tuning..
285.	Makoto Nakamura, Susumu Nishihara, Kazuyoshi Nishimura, Keiji Kishine, Shunji Kimura, Tomoaki Yoshida, Yusuke Ohtomo, Naoto Yoshimoto, Kazutoshi Kato, A 10G burst-mode PIN-TIA module with 10-nsec response for PON systems, 20th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS, 2007.12, A 10G burst-mode PIN-TIA module has been developed using a fast two-stage AOC technique. It exhibits a quick response of 10 nsec, high sensitivity of-19.5 dBm, and a wide dynamic range of 20.5 dB..
286.	Akira Ohki, Seiji Fukushima, Mitsuru Sugo, Kazutoshi Kato, Yuji Akatsu, Novel TO-BOSA for FTTH using new optical path alignment technology, OFC/NFOEC 2007 - Optical Fiber Communication and the National Fiber Optic Engineers Conference 2007, 2007.12, We propose a new assembly technique that provides cost-effective way to integrate Tx and Rx in one TO-pakage. The TO-BOSA developed using this technique performed sufficientyly well for FTTH service applicatons..
287.	Takashi Nakanishi, Youichi Fukada, Ken Ichi Suzuki, Naoto Yoshimoto, Makoto Nakamura, Kazutoshi Kato, Kazuyoshi Nishimura, Yusuke Ohtomo, Makoto Tsubokawa, Wide dynamic range and high sensitivity APD burst receiver configuration based on m-switching technique for 10GEPON system, 20th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS, 2007.10, We propose the M-switching technique to realize a high sensitivity and wide dynamic range 10Gbit/s APD burst receiver. Experiments show that the combination of M-switching and FEC realizes high sensitivity (-31.4dBm) and wide dynamic range (24.4dB)..
288.	Takeshi Kurosaki, Yasuo Shibata, Nobuhiro Kikuchi, Ken Tsuzuki, Wataru Kobayashi, Hiroshi Yasaka, Kazutoshi Kato, 200-km 10-gbit/s optical duobinary transmission using an n-i-n InP mach-zehnder modulator, IPRM'07: IEEE 19th International Conference on Indium Phosphide and Related Materials, 2007.05, We have demonstrated 10-Gbit/s optical duobinary transmission using an n-i-n InP Mach-Zehnder modulator. A 200-km single-mode fiber transmission with no bit-error-rate floor and small sensitivity penalty was achieved under push-pull operation with low-driving voltage (
289.	Susumu Nishihara, Shunji Kimura, Tomoaki Yoshida, Makoto Nakamura, Jun Terada, Kazuyoshi Nishimura, Keiji Kishine, Kazutoshi Kato, Yusuke Ohtomo, Takamasa Imai, A 10.3125-Gbit/s SiGe BiCMOS burst-mode 3R receiver for 10G-EPON systems, National Fiber Optic Engineers Conference, NFOEC 2007, 2007.03, The first burst-mode 3R receiver operating at 10.3125 Gbit/s using monolithic ICs is reported. We achieved sensitivity of -18.0 dBm with a PIN-PD, dynamic range of over 16.5 dB, and instantaneous responsivity of 75 ns. These are the highest sensitivity and the widest dynamic-range among all reported 10-Gbit/s-class burst-mode receivers for NRZ data format..
290.	N. Fujiwara, R. Yoshimura, Kazutoshi Kato, H. Ishii, Y. Kawaguchi, Y. Kondo, H. Oohashi, 70 nm fast wavelength sweep using SSG-DBR lasers, Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2007, 2007.01, A quasi-continuous wavelength sweep range of 70 nm is achieved by utilizing thermal compensation in SSG-DBR lasers. The frequency spacing is set at 6.25 GHz, and the output power is 10 mW for the whole tuning range. Thermal drift compensation enhances wavelength accuracy, and realizes fast and stable tuning..
291.	Susumu Nishihara, Makoto Nakamura, Kazuyoshi Nishimura, Keiji Kishine, Shunji Kimura, Kazutoshi Kato, A fast-response and high-sensitivity PIN-TIA module with wide dynamic range for 10G burst-mode transmissions, 2007 33rd European Conference and Exhibition of Optical Communication, ECOC 2007, 2007.01, A 10G burst-mode PIN-TIA module has been developed with a new function of automatic offset compensation. An instantaneous response of 10 ns, high sensitivity of-19.5 dBm, and a wide dynamic range of 20.5 dB were obtained..
292.	Nobuhiro Nunoya, Yasuo Shibata, Hiroyuki Ishii, Hiroshi Okamoto, Yoshihiro Kawaguchi, Yasuhiro Kondo, Hiromi Oohashi, Kazutoshi Kato, Novel tunable DFB laser with separated high coupling coefficient gratings, 2006 International Conference on Indium Phosphide and Related Materials Conference Proceedings, 2006.12, A novel continuously tunable DFB laser is proposed that has separated high coupling coefficient gratings with simple current tuning. Deep corrugations designed to realize a high coupling coefficient are fabricated by using dry etching followed by shallow wet chemical etching and slow speed re-growth. A large stop-band width achieved by using a grating with a coupling coefficient as high as 200 cm^-1 provides a continuous tuning wavelength range of 2.1 nm..
293.	Ken Tsuzuki, Nobuhiro Kikuchi, Hiroaki Sanjoh, Yasuo Shibata, Kazuo Kasaya, Hiromi Oohashi, Hiroyuki Ishii, Kazutoshi Kato, Yuichi Tohmori, Hiroshi Yasaka, Compact wavelength tunable laser module integrated with n-i-n structure Mach-Zehnder modulator, 2006 European Conference on Optical Communications, ECOC 2006, 2006.09, A compact wavelength tunable laser module is fabricated by integrating a wavelength tunable laser array and an n-i-n structure Mach-Zehnder modulator. Without the need to change the driving condition of the Mach-Zehnder modulator, the module can operate at 10 Gb/s in the 32 nm C-band range..
294.	Kazutoshi Kato, Hiroki Itoh, Yoshio Itaya, Photonic integrated devices for WDM application, Integrated Photonics Research and Applications, IPRA 2006, 2006.04, The integration of optical semiconductor devices such as lasers, photodetectors, wavelength multiplexers/demultiplexers and optical amplifiers/gates realizes the wavelength tunable function required for WDM systems. We describe several monolithic integrated devices being developed for WDM applications..
295.	H. Masuda, A. Mori, K. Shikano, K. Oikawa, Kazutoshi Kato, M. Shimizu, Ultra-wide-band hybrid tellurite/silica fiber Raman amplifier, Optical Fiber Communication Conference and Exhibit, 2002.03, A novel hybrid tellurite/silica fiber Raman amplifier was reported. This amplifier yielded a flattened gain spectrum and a gain bandwidth of 135 nm with a minimum gain of 22.8 dB. The maximum and minimum gains in the gain-band of the amplifier were 34.6 and 22.8 dB respectively. It was used as a pre-amplifier in an eight-channel×10-Gb/s transmission experiment..
296.	T. Kurosaki, T. Hashimoto, N. Ishihara, Y. Suzuki, M. Yanagisawa, H. Kimura, M. Nakamura, Y. Tohmori, Kazutoshi Kato, Y. Kawaguchi, Y. Akahori, Y. Yamada, Ku Kato, H. Toba, J. Yoshida, Full duplex 1300/1550-nm-WDM optical transceiver modules for ATM-PON systems using PLC-hybrid-integration and CMOS IC technologies, Proceedings of the 1998 24th European Conference on Optical Communication, ECOC. Part 1 (of 3), 1998.12, The optical transceivers using a PLC -optical-hybrid-integrated module and CMOS front-end ICs for ATM-PON systems are realized. Under full duplex operation at 156 Mb/s, receiver sensitivity of less than -34 dBm and dynamic range of over 28 dB are achieved, which satisfies FSAN-class B/C specification..
297.	I. Ogawa, F. Ebisawa, N. Yoshimoto, K. Takiguchi, F. Hanawa, T. Hashimoto, A. Sugita, M. Yanagisawa, Y. Inoue, Y. Yamada, Y. Tohmori, S. Mino, T. Ito, K. Magari, Y. Kawaguchi, A. Himeno, Kazutoshi Kato, Lossless hybrid integrated 8-ch optical wavelength selector module using PLC platform and PLC-PLC direct attachment techniques, 1998 Optical Fiber Communication Conference, OFC 1998, 1998.01.
298.	Hiroyasu Mawatari, Mitsuo Fukuda, Kazutoshi Kato, Atsuo Kozen, Masahiro Yuda, Tatsuya Takeshita, Naoto Uchida, Hiromu Toba, Reliability and degradation behavior of a InGaAsP/InP waveguide photodiode for subscriber systems, Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim, 1997.07, A selective-area impurity-doped planar edge-coupled waveguide photodiode (SIMPLE-WGPD) has a long lifetime for subscriber system use and the device life is determined by the perimeter of the pn-junction. The thickness of the absorption layer is 3 μm. The pn-junction is formed at the absorption layer by means of Zn diffusion from the surface. The facet at which the input light received is formed by cleavage and coated with SiN, filmed formed by plasma enhanced chemical vapor deposition. The responsivity is about 0.8 A/W at bias of -2 V. On these SIMPLE-WGPDs, several kinds of reliability tests were performed..
299.	T. Kominato, A. Himeno, M. Ishii, T. Goh, K. Hattori, F. Hanawa, Kazutoshi Kato, Silica-based optical switch with a single-facet fiber array connection, Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim, 1997.07, To reduce the optical fiber interconnection area needed when mounting on a printed circuit board, a silica-based 4×4 thermo-optic matrix switch makes use of a single fiber array connection, with the input and output waveguides of the switch chip located on one side of the chip. The logical arrangement of the switch is based on the path independent insertion loss (PI-LOSS) arrangement whose switch elements are composed of double Mach-Zehnder interferometers. This configuration enables a low insertion loss and high extinction ratio to be achieved. The cost of the module is also reduced as a result of the reduction in the number of fiber connection components..
300.	Makoto Yaita, Tadao Nagatsuma, Kazuto Noguchi, Hiroshi Miyazawa, Kazutoshi Kato, Taiichi Otsuji, Kazuyoshi Matsuhiro, Osamu Mitomi, Ultrafast optical eye diagram measurement using optoelectronic techniques, Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim, 1997.07, A fast waveguide p-i-n photodiode (WGPD) and a traveling-wave electro-optic (EO) modulator are used to achieve an optical eye diagram measurement. The optical sampling head consists of a traveling-wave LiNbO₃ intensity modulator, an optical-to-electrical conversion probe head with the WGPD, and a bias/termination probe head. Optical sampling pulses of 0.7-ps full width at half maximum (FWHM) are generated using a fiber laser at 40-MHz repetition rate. The bandwidth of the system is limited by the chip-to-chip interconnection using the probe heads since the 3-dB bandwidths of the WGPD and the LiNbO₃ modulator are beyond 100 GHz..
301.	N. Uchida, Y. Yamada, Y. Hibino, Y. Suzuki, T. Kurosaki, N. Ishihara, M. Nakamura, T. Hashimoto, Y. Akahori, Y. Inoue, K. Moriwaki, Kazutoshi Kato, Y. Tohmori, M. Wada, T. Sugie, Low-cost and high-performance hybrid WDM module integrated on a PLC platform for fiber-to-the-home, Proceedings of the 1996 22nd European Conference on Optical Communication, ECOC. Part 5 (of 6), 1996.12, Recent progress on a low-cost and high-performance hybrid WDM module for fiber-to-the-home is presented. The low-cost module is achieved by employing a flip-chip bonding method with passive alignment using a spot-size converter integrated laser diode (SS-LD) and waveguide photodiodes (WGPDs) on a planar lightwave circuit (PLC) platform. It is clarified that the SS-LD and the WGPD provide high coupling efficiency and a tolerance large enough for passive alignment. To achieve receiver hightsensitivity, the module is designed to employ an asymmetric PLC Y-splitter that prefers the PD responsivity and to reduce the parasitic capacitance. Dynamic properties for a 50-Mb/s burst signal, such as instantaneous AGC response and a small APC deviation of the transceiver, are also demonstrated..
302.	Osamu Mitomi, Kohichi Wakita, Kazutoshi Kato, Millimeter-wave region optical devices, Proceedings of the 1996 International Topical Meeting on Microwave Photonics, MWP'96, 1996.12, This paper describes ultra-high-speed optical-device structures and characteristics of Mach-Zehnder waveguide LiNbO₃ modulators, electroabsorption MQW semiconductor modulators, and edge-coupled photodetectors..
303.	Noboru Iwasaki, Fuminori Ishitsuka, Kazutoshi Kato, High performance flip-chip technique for wide-band modules, Proceedings of the 1996 5th Topical Meeting on Electrical Performance of Electronic Packaging, 1996.10, A novel wide-band flip-chip technique is proposed, where optimized wide-gap coplanar waveguides are used to reduce the discontinuity. The flip-chip technique made it possible to achieve the return loss of over 28 dB up to 60 GHz..
304.	Akihide Sano, Tomoyoshi Kataoka, Masahito Tomizawa, Kazuo Hagimoto, Kenji Sato, Koichi Wakita, Kazutoshi Kato, Automatic dispersion equalization by monitoring extracted-clock power level in a 40-Gbit/s, 200-km transmission line, Proceedings of the 1996 22nd European Conference on Optical Communication, ECOC. Part 5 (of 6), 1996.09, A novel receiver configuration enabling automatic dispersion equalization is proposed. An equalizer is configured with variable-dispersion, and it is shown that the optimum dispersion can be detected by monitoring the clock component of the transmitted signal after square law detection. Using this equalizer, a 40-Gbit/s transmission experiment over 200 km of DSF was successfully carried out..
305.	N. Uchida, Y. Hibino, Y. Suzuki, T. Kurosaki, N. Ishihara, M. Nakamura, T. Hashimoto, Y. Akahori, Y. Inoue, K. Moriwaki, Y. Yamada, Kazutoshi Kato, Y. Tohmori, M. Wada, T. Sugie, Passively aligned hybrid WDM module integrated with a spot-size converted laser diode and waveguide photodiode on a PLC platform for fiber-to-the-home, 19th Optical Fiber Communication Conference, OFC 1996, 1996.01.
306.	Y. Akatsu, Y. Muramoto, M. Ikeda, M. Ueki, A. Kozen, T. Kurosaki, K. Kawano, Kazutoshi Kato, J. Yoshida, 1.3-μm multimode waveguide photodiodes suitable for optical hybrid integration with a planar lightwave circuit, Proceedings of the 1995 21st European Conference on Optical Communication, ECOC'95. Part 1 (of 4), 1995.09, We propose a multimode waveguide photodiode utilizing asymmetric waveguide structure which is suitable for optical hybrid integration without coupling lenses, and has a high responsivity of 0.95 A/W at a wavelength of 1.31 μm. Its 1-dB coupling tolerance to a planar lightwave circuit is ±2 μm in the vertical direction..
307.	R. Nagase, Kazutoshi Kato, S. Iwano, Simplified SC-type receptacles for optical subscriber systems, Proceedings of the 1995 21st European Conference on Optical Communication, ECOC'95. Part 1 (of 4), 1995.09, We have developed novel, low-cost simplified SC-type receptacles. They are fully compatible with normal SC plugs, and have the same optical characteristics as SC connectors..
308.	Taiichi Otsuji, Kazutoshi Kato, Tadao Nagatsuma, Mikio Yoneyama, 10 to 72-Gb/s, optoelectronic RZ pulse-pattern generation and its application to on-wafer large-signal characterization for ultrahigh-speed electronic devices, Proceedings of the 1994 IEEE LEOS Annual Meeting. Part 1 (of 2), 1994.08, A pulse-rate tunable, fully electrically controllable optoelectronic random pulse generator operating at 10 to 72 Gb/s in return-to-zero (RZ) mode and an on-wafer optical-to-electrical conversion stimulus probe head with 0.6-A/W responsivity, 200-mVpp saturation output, and a near 100-GHz bandwidth is addressed. Its application, in combination with electrooptic sampling (EOS), to characterizing an ultrawide band amplifier is also demonstrated..
309.	K. Sakuma, J. Haruki, G. Sakano, Kazutoshi Kato, S. Hisatake, T. Nagatsuma, Coherent THz wave combiner composed of arrayed uni-traveling carrier photodiodes and planar lightwave circuit, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, For high-power THz wave generation by photomixing of two lightwaves, we proposed the synchronous power combiner which consists of eight-arrayed photomixers/antennas and the THz phase control system. We experimentally confirmed the effectiveness of the power combination by synchronizing the phases of the THz wave by the mechanical optical delay lines and also demonstrated the same functionality at the lightwave-circuit-based optical phase control system. We found that the directional gain is increasing with increasing the number of photomixers from two to three and it reached up to 4.5 dB..
310.	Ryoga Kimura, Yudai Tatsumoto, Takeshi Kuboki, Kazutoshi Kato, Internal-wavelength-locker based feedforward/feedback co-operative wavelength control for 100 ns wavelength switching.
311.	H. Onji, S. Takeuchi, Y. Tatsumoto, N. Nunoya, M. Shimokozono, H. Ishii, Kazutoshi Kato, 35 ns wavelength switching with +/-1 GHz wavelength accuracy using tunable distributed amplification (TDA-) DFB lasers, Photonics in Switching, PS 2014, For fast wavelength switching of TDA-DFB lasers, the feedforward controller is designed. Experimental results show switching times of 35 ns and 30 ns when the optical frequency changes from 192.8 THz to 193.0 THz and vice versa..
312.	Tadao Nagatsuma, Kazutoshi Kato, Photonically-assisted 300-GHz wireless link for real-time 100-Gbit/s transmission, 2014 IEEE MTT-S International Microwave Symposium, IMS 2014, Previously reported 100-Gbit/s wireless links have been based on an off-line digital signal processing and/or have assumed a use of forward-error correction (FEC) technique. In this paper, we discuss a strategy for real-time/error-free 100-Gbit/s transmission using photonically-assisted signal generation and modulation techniques at 300 GHz, and demonstrate some of our recent results towards 100-Gbit/s transmission..
313.	Hirokazu Onji, Shota Takeuchi, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, Acceleration of wavelength switching for tunable distributed amplification (TDA-) DFB lasers, 2013 18th Microoptics Conference, MOC 2013, The feedforward controller is designed and demonstrated to accelerate the wavelength switching for the tunable distributed amplification (TDA) DFB lasers. The controller has an impulse overshoot waveform so as to induce prompt transition of short time phenomena. The controlled laser shows a wavelength switching time of 150 ns which shows effectiveness of the proposed technique..
314.	Mohammad Nasir Uddin, Takaaki Kizu, Yasuhiro Hinokuma, Akio Tajima, Kazutoshi Kato, Kiichi Hamamoto, Demonstration of resonance frequency enhancement effect by using split pumping region in active multi-mode interferometer laser diode, 2013 18th OptoElectronics and Communications Conference Held Jointly with 2013 International Conference on Photonics in Switching, OECC/PS 2013, We demonstrate for the first time, the resonance frequency enhancement effect by using split pumping region in active multi-mode interferometer laser diode (active MMI LD). Significant enhancement of 3 dB bandwidth up to 6.2 GHz from 2.3 GHz due to the enhancement of resonance frequency has been successfully confirmed by using this scheme..
315.	Mohammad Nasir Uddin, Takaaki Kizu, Yasuhiro Hinokuma, Kazuhiro Tanabe, Akio Tajima, Kazutoshi Kato, Kiichi Hamamoto, First demonstration of high intrinsic modulation bandwidth (26.4 GHz) in active multimode interferometer laser diode by using split pumping configuration, 2013 18th Microoptics Conference, MOC 2013, High intrinsic 3dB modulation bandwidth in asymmetric active multimode interferometer laser diode is demonstrated by using split pumping configuration. Significant enhancement of 3 dB intrinsic bandwidth up to 24.6 GHz has been confirmed successfully by using this scheme..
316.	Shota Takeuchi, Hirokazu Onji, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, Wavelength stabilization of tunable lasers based on thermal-drift canceler, 2013 18th Microoptics Conference, MOC 2013, The wavelength stabilization based on the digitally controlled thermal-drift canceler is proposed and experimentally demonstrated. The tunable distributed amplification (TDA-) DFB laser controlled by this canceler reaches the targeted wavelength within a microsecond and keeps it stably..
317.	Shogo Yagi, Kazunori Naganuma, Tadayuki Imai, Yasuo Shibata, Jun Miyazu, Masahiro Ueno, Yuuichi Okabe, Yuzo Sasaki, Kazuo Fujiura, Masahiro Sasaura, Kazutoshi Kato, Masato Ohmi, Masamitsu Haruna, Improvement of coherence length in a 200-kHz swept light source equipped with a KTN deflector, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI, We are developing a new light source for swept-source OCT, namely, an external-cavity LD equipped with a KTN electro-optic deflector. Being free from mechanical resonance, our 1.3-μm laser exhibits scanning range of almost 100 nm up to 200-kHz under a ±300 V deflector driving voltage. Using a semi-empirically derived equation, we find that KTN's convex lens power degrades the coherence length, and this can be compensated with a cylindrical concave lens. Such compensation was experimentally confirmed by observing reduction of elliptical beam divergence. OCT images of a human fingernail are obtained using the swept source..

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