MOC2025 Student Paper Award
Generation of Modulated THz Waves Using a Two-Wavelength Tunable Silicon Photonics Heterogeneous Laser Diode
Kiyoharu Tsujishita
PDW2021 Best Student Poster Award
ハイブリッド波長可変レーザの直接位相変調を用いた距離計測の検討
川名理緒
PDW2021 Best Student Poster Award
ファイバ・ファブリ・ペロー共振器を用いた自己注入同期によるハイブリッド波長可変レーザーの線幅狭窄化
小栁和輝
PDW2020 Best Student Poster Award
Si光変調器の高消光比化
小島大輝
学術論文誌
Takeru Tsunoda and Tomohiro Kita, "A SiN/Si hybrid wavelength-tunable laser enabling megahertz-order FMCW ranging via thermo-optic phase modulation," Japanese Journal of Applied Physics 65, 07SP03 (2026). DOI 10.35848/1347-4065/ae4fcb
Risa Taniguchi, Momoka Komoda and Tomohiro Kita, "Effective resolution enhancement of a passive optical phased array using a multi-input star coupler," Japanese Journal of Applied Physics 65, 05SP10 (2026). DOI 10.35848/1347-4065/ae46391
Yuga Tomimura,Akira Satou, and Tomohiro Kita, "Generation of Millimeter Waves and Sub-Terahertz Waves Using a Two-Wavelength Tunable Laser for a Terahertz Wave Transceiver," Photonics 11(9), 811 (2024). DOI:10.3390/photonics11090811
Tatsuya Yabuki and Tomohiro Kita, "Optimization of the coupling efficiency under self-injection locking in a narrow linewidth hybrid wavelength tunable laser diode," Japanese Journal of Applied Physics 63, 03SP54 (2024). DOI:10.35848/1347-4065/ad3475
Yamato Misugi, Tomoki Nakano, and Tomohiro Kita, "Silicon-based high-resolution and low-power-consumption two-dimensional beam scanner integrated with hybrid wavelength-tunable laser diode," Optics Express 32(8), pp. 13746-13760 (2024). DOI:10.1364/OE.513719
Kohei Iino and Tomohiro Kita, "Low thermal crosstalk silicon MZI optical switch with high speed and low power consumption," Japanese Journal of Applied Physics 63, 03SP21 (2024). DOI:10.35848/1347-4065/ad2e46
Kissho Iwanaga, Yuga Tomimura, and Tomohiro Kita, "Silicon photonics hybrid wavelength tunable laser diode using curved directional couplerswith145 nm tunable range," Japanese Journal of Applied Physics 63, 03SP52 (2024). DOI:10.35848/1347-4065/ad25ae
Kissho Iwanaga, Yuga Tomimura, and Tomohiro Kita, "Hybrid Laser Diode with Ultrawide Wavelength-Tunable Range using Curved Directional Couplers," Optics Express 31, pp. 34946-34953 (2023). DOI:10.1364/oe.499687
Yamato Misugi, Hideaki Okayama, and Tomohiro Kita, "Compact and low power-consumption solid-state two-dimensional beam scanner integrating a passive optical phased array and hybrid wavelength-tunable laser diode," IEEE Journal of Lightwave Technology, 41(11), pp. 3505 - 3512 (2023). DOI：10.1109/JLT.2023.3244847
Kohei Iino and Tomohiro Kita, "Ultrafast operation of Si thermo-optic switch using differential control method," Japanese Journal of Applied Physics 62, 012002 (2022). https://doi.org/10.35848/1347-4065/aca268
Yamato Misugi, Hideaki Okayama, and Tomohiro Kita “Demonstration of 2D beam steering using large-scale passive optical phased array enabled by multimode waveguides with reduced phase error,” Applied Physics Express 15, 102002 - 1 - 5 (2022).
Hiroki Kojima, Junichi Fujikata, and Tomohiro Kita “High-extinction-ratio Si optical modulator loaded with integrated,” Japanese Journal of Applied Physics 61, SK1001 - 1 - 5 (2022).
Tomohiro Kita and Manuel Mendez-Astudillo “Ultrafast Silicon MZI Optical Switch With Periodic Electrodes and Integrated Heat Sink,” Journal of Lightwave Technology 39(15), 5054 - 5060 (2021).
北 智洋, メンデス アストゥディージョ マヌエル, “シリコンフォトニクスハイブリッドレーザの高速波長切り替え動作,” 電子情報通信学会論文誌 C J103-C, 11, pp. 428-433 (2020). [Invited]
Masaki Okamoto, Manuel Mendez-Astudillo, and Tomohiro Kita “Thermo-optic phase shifter with sub-microsecond switching time and low power consumption,” Japanese Journal of Applied Physics 59, SOOA03-1 - SOOA03-5 (2020).
Xiaoyang Cheng, Feng Qiu, Andrew M. Spring, Masaru Sasaki, Tsubasa Kashino, Masaaki Ozawa, Hideyuki Nawata, Tomohiro Kita, Okihiro Sugihara, and Shiyoshi Yokoyama “Camera sensor platform for high speed video data transmission using a wideband electro-optic polymer modulator,” Optics Express 27(3), 1877 - 1883 (2019).
Manuel Mendez-Astudillo, Masaki Okamoto, Yoshiaki Ito, and Tomohiro Kita “Compact thermo-optic MZI switch in silicon-on-insulator using direct carrier injection,” Optics Express 27(2), 899 - 906 (2019).
Manuel Mendez-Astudillo, Hideaki Okayama, Hirochika Nakajima, and Tomohiro Kita “Rectangular resonators on silicon-on-insulator with large sensing area for object detection,” Japanese Journal of Applied Physics 58, SJJD04-1 – SJJD04-5 (2019).
Tomohiro Kita, Atsushi Matsumoto, Naokatsu Yamamoto, and Hirohito Yamada “Tunable dual-wavelength heterogeneous quantum dot laser diode with a silicon external cavity,” IEEE Journal of Lightwave Technology 36(2), 219 - 224 (2018). [Invited]
Tomohiro Kita, Tang Rui, and Hirohito Yamada “Narrow Spectral Linewidth Silicon Photonic Wavelength Tunable Laser Diode for Digital Coherent Communication System,” IEEE Journal of Selected Topics in Quantum Electronics 22(6), 1500612 (2016). [Invited]
Tomohiro Kita, Naokatsu Yamamoto, Atsushi Matsumoto, Tetsuya Kawanishi, and Hirohito Yamada “Heterogeneous quantum dot/silicon photonics-based wavelength-tunable laser diode with a 44 nm wavelength-tuning range,” Japanese Journal of Applied Physics 55, 04EH11-1 – 4 (2016).
国際学会
2025
[Post-deadline paper]Takeru Tsunoda, Tomohiro Kita,"Ultra-high repetition FMCW measurement using thermo-optic effects with SiN/Si hybrid wavelength tunable laser diode ", Micro Optics Conference（MOC 2025),2025, 栃木(日本).
Kiyoharu Tsujishita, Soma Kawano, Tomohiro Kita, "Generation of modulated THz waves using a two-wavelength tunable silicon photonics heterogeneous laser diode", Micro Optics Conference（MOC 2025),2025, 栃木(日本).
Momoka Komoda, Risa Taniguchi, Tomohiro Kita,"Resolution enhancement of passive optical phased arrays using a star coupler ", Micro Optics Conference（MOC 2025),2025, 栃木(日本).
[Invited]Tomohiro Kita,"THz Modulated Wave Generation Using a Heterogeneous Two-Wavelength Tunable Laser Diode", Terahertz-Related Devices and Technologies（Tera Tech2025）,2025, サラマンカ(スペイン).
<2024>
Yuga Tomimura, Dohyeong Lee, Akira Satou, Taiichi Otsuji and Tomohiro Kita,
"THz transmitter using silicon photonics based two-wavelength tunable laser diode and ring modulator ", Micro Optics Conference（MOC 2024),2024, 台湾.
Tomohiro Kita, "Silicon Photonics Hybrid Tunable Laser Diode with Wavelength Tuning Range Exceeding 150 nm", International Semiconductor Laser Conference (ISLC 2024), 2024, フロリダ(アメリカ).
<2023>
Ryosuke Sato, Rai Kou, Noritsugu Yamamoto, Yuki Atsumi, Guangwei Cong, Toshiya Murai, Yuriko Maegami, Atsushi Ishizawa, Koji Yamada, Tomohiro Kita,
"Supercontinuum Generation in Si-SiO2-Si Horizontal Slot Waveguide Fabricated by μ-Transfer Printing", Conference on Lasers and Electro-Optics（CLEO2023）,2023, サンノゼ(アメリカ).
Yamato Misugi, Tomohiro Kita, "Silicon Based High Resolution Passive Optical Phased Array Consisting of Multi-Mode Waveguides", Micro Optics Conference (MOC2023),
2023, 宮崎(日本).
Kissho Iwanaga, Yuga Tomimura, Tomohiro Kita, "Hybrid Wavelength Tunable Laser Diode using Curved Directional Couplers with Small Wavelength Dependence", Micro Optics Conference (MOC2023),2023, 宮崎(日本).
Kohei Iino, Tomohiro Kita,"Compact Silicon MZI Optical Switch with Low Thermal-crosstalk", Micro Optics Conference (MOC2023),2023, 宮崎(日本).
Tatsuya Yabuki, Tomohiro Kita,"Narrow Spectral Linewidth Wavelength Tunable Laser Diode using Self-injection Locking", Micro Optics Conference (MOC2023),2023, 宮崎(日本).
Shu Irie, Yamato Misugi, Tomohiro Kita, "High repetition FMCW measurement using direct modulation of a hybrid wavelength tunable laser diode", Micro Optics Conference (MOC2023),2023, 宮崎(日本).
<2022>
Kissho Iwanaga, Wataru Masuda, Atsushi Matsumoto, Naokatsu Yamamoto, Tomohiro Kita, "Quantum Dot SiPh Hybrid Wavelength Tunable Laser Diode with 100 nm Tunable Range", International Semiconductor Laser Conference (ISLC 2022), 2022, 松江(日本).
Kohei Iino, Tomohiro Kita, “Compact Si MZI Optical Switch with high speed, low power consumption”, 27th Microoptics Conference (MOC 2022), 2022, Jena (Germany).
Yamato Misugi, Hideaki Okayama, Tomohiro Kita, "Wavelength Sweep 2D Laser Beam Scanner", 27th Microoptics Conference (MOC 2022), 2022, Jena (Germany).
Hiroki Kojima, Kohei Iino, Tomohiro Kita, "Si-Electro-Optical Switch with High Extinction Ratio", 27th Microoptics Conference (MOC 2022), 2022, Jena (Germany).
Ryosuke Sato, Rai Kou, Noritsugu Yamamoto, Cong Guangwei, Koji Yamada, Tomohiro Kita, "Dispersion-Controlled Supercontinuum Generation via µ-Transfer Printing", 27th Microoptics Conference (MOC 2022), 2022, Jena (Germany).
Yamato Misugi, Hideaki Okayama, Tomohiro Kita, "Low Power Consumption 2D Beam Scanner Integrated with Wavelength Tunable Laser Diode", European Conference on Optical Communication(ECOC2022), 2022, Basel (Switzerland).
Kohei Iino and Tomohiro Kita, "Ultra-Fast Optical Switching Using Differential Control Method", European Conference on Optical Communication(ECOC2022), 2022, Basel (Switzerland).
<2021>
Wataru Masuda, Kissho Iwanaga, Atsushi Matsumoto, and Tomohiro Kita, "C-band Tunable Dual-Wavelength Laser with a Quantum Dot SOA", International Semiconductor Laser Conference (ISLC 2021), 2021, Online.
Hiroki Kojima, Jun-ichi Fujikata, and Tomohiro Kita, "High extinction ratio Si optical modulator loaded with integrated polarizer", 23rd Microoptics Conference (MOC 2021), 2021, Online.
<2019>
Manuel Mendez-Astudillo, "Silicon Photonic Devices for Refractive Index Sensing and Biosensing", International conference on photonics solutions (ICPS2019), 2019, Chen-mai(Thailand). [Invited]
Tomohiro Kita, "High speed wavelength switching of heterogeneous silicon photonic laser", International conference on photonics solutions (ICPS2019), 2019, Chen-mai(Thailand). [Invited]
Masaki Okamoto Manuel Mendez-Astudillo,Tomohiro Kita, "High speed and Low power consumption, Thermo-optic phase shifter", 24th Microoptics conference (MOC2019), 2019, 富山/富山国際会議場.
Yoshiaki Ito, Manuel Mendez-Astudill,Tomohiro Kita, "Wavelength-independent Q-value Ring Resonator with Curved Directional Coupler", 24th Microoptics conference (MOC2019), 2019, 富山/富山国際会議場.
Tomohiro Kita , Manuel Mendez-Astudillo, Mieko Masaka, Freddy Susanto Tan, and Okihiro Sugihara, "Athermal Silicon Ring Resonators with TiO2 Hybrid-Polymer Claddings", 24th Microoptics conference (MOC2019), 2019, 富山/富山国際会議場.
<2018>
Manuel Mendez-Astudillo, Hideaki Okayama, and Tomohiro Kita, "Fabry-Perot Cavity Using Two Row Photonic Crystal in a Multimode", Conference on Lasers and Electro-Optics (CLEO2019), pp. 1–2, サンノゼ(アメリカ).
M. Mendez-Astudillo, H. Okayama, T. Kita, and H. Nakajima, "Phase-Shifted Multimode Bragg Gratings in Silicon-on-Insulator for Sensing Applications", IEEE 15th International Conference on Group IV Photonics 2018 (GFP2018), pp. 1–2, 2018, カンクン(メキシコ).
Tomohiro Kita, Atsushi Matsumoto, Naokatsu Yamamoto, Manuel Mendez-Astudillo, and Hirohito Yamada, “Two-wavelength tunable laser diode using a quantum dot SOA and a silicon photonic external cavity”, International Semiconductor Laser Conference (ISLC 2018), 2018 サンタフェ(アメリカ). [Invited]
Manuel Mendez-Astudillo, Hideaki Okayama, Hirochika Nakajima, and Tomohiro Kita, “Rectangular Resonators in Silicon-on-Insulator for TM polarized light with high Q values”, 23rd Microoptics Conference (MOC 2018), P58, 2018 台北(台湾).
