Planar lightwave circuit dispersion compensator using a compact arrowhead arrayed-waveguide grating. - Takanori Suzuki; Kenichi Masuda; Hiroshi Ishikawa 006; Yukio Abe; Seiichi Kashimura; Hisato Uetsuka; Hiroyuki Tsuda (IEICE Electron. Express, 2005)

Compact silica arrayed-waveguide grating with small bend radius utilizing trenches filled with low-refractive index material. - Jiro Ito; Tom Yen-Ting Fan; Takanori Suzuki; Hiroyuki Tsuda (IEICE Electron. Express, 2006)

A novel 2 × 2 multi-arm type of optical switch using multimode interference couplers. - Kenichi Masuda; Atsushi Tate; Hiroyuki Tsuda (IEICE Electron. Express, 2006)

Dispersion compensator using a compact arrayed-waveguide grating with a dispersion-adjusting structure. - Takanori Suzuki; Kenichi Masuda; Hiroshi Ishikawa 006; Yukio Abe; Seiichi Kashimura; Hisato Uetsuka; Hiroyuki Tsuda (IEICE Electron. Express, 2006)

Arrayed-waveguide grating with wavefront compensation lenses for spatial filter integration. - Mitsuhiro Yasumoto; Takanori Suzuki; Atsushi Tate; Hiroyuki Tsuda (IEICE Electron. Express, 2006)

Integrated loop mirrors for catoptric functional waveguide devices. - Yuichiro Ikuma; Jiro Ito; Hiroyuki Tsuda (IEICE Electron. Express, 2008)

Proposal of a small self-holding 2×2 optical switch using phase-change material. - Yuichiro Ikuma; Toshiharu Saiki; Hiroyuki Tsuda (IEICE Electron. Express, 2008)

Compact Silica Arrayed-Waveguide Grating Using High-Mesa Small-Bend Waveguides. - Jiro Ito; Tom Yen-Ting Fan; Takanori Suzuki; Hiroyuki Tsuda (IEICE Trans. Electron., 2008)

An athermal delay interference circuit using trenches filled with low-refractive index material. - Kenji Iwamoto; Jiro Ito; Hiroyuki Tsuda (IEICE Electron. Express, 2009)

Low loss, small crosstalk offset crossing structure for large-scale planar lightwave circuits. - Daiki Tanaka; Yuichiro Ikuma; Hiroyuki Tsuda (IEICE Electron. Express, 2009)

High-Speed Photonic Functional Circuits Using Electrically Controllable PLZT Waveguides. - Jiro Ito; Mitsuhiro Yasumoto; Keiichi Nashimoto; Hiroyuki Tsuda (IEICE Trans. Electron., 2009)

LiNbO3 optical switch using asymmetric X-junction waveguide for broadband optical network node. - Takuya Sakamaki; Yu Narita; Hiroyuki Tsuda; Shinya Nakajima; Tetsuya Kawanishi (IEICE Electron. Express, 2010)

Fast aberration-correcting algorithm for an SLM-based optical switch. - Keisuke Sorimoto; Kenji Kintaka; Hitoshi Kawashima; Masahiko Mori; Toshifumi Hasama; Hiroshi Ishikawa 006; Hiroyuki Tsuda; Hisato Uetsuka (IEICE Electron. Express, 2010)

Tunable optical dispersion compensator with a high-resolution arrayed-waveguide grating. - Yuichiro Ikuma; Takayuki Mizuno; Hiroshi Takahashi; Hiroyuki Tsuda (IEICE Electron. Express, 2011)

Optical spectrum control circuit using an arrayed-waveguide grating and tunable phase shifters. - Koichi Kato; Yuichiro Ikuma; Hiroshi Takahashi; Takayuki Mizuno; Hiroyuki Tsuda (IEICE Electron. Express, 2011)

Phase error compensation for multilayered AWG in LCOS-based WSS. - Keisuke Sorimoto; Kenji Kintaka; Hitoshi Kawashima; Masahiko Mori; Toshifumi Hasama; Hiroshi Ishikawa 006; Hiroyuki Tsuda; Hisato Uetsuka (IEICE Electron. Express, 2011)

200-GHz spacing, 8ch, high-speed wavelength selective arrayed-waveguide grating using buried PLZT waveguides. - Hideaki Asakura; Keiichi Nashimoto; David Kudzuma; Masahiko Hashimoto; Hiroyuki Tsuda (IEICE Electron. Express, 2012)

A novel silica waveguide lens for free-space optical cross connects. - Nazirul Afham Idris; Keisuke Sorimoto; Hiroyuki Tsuda (IEICE Electron. Express, 2012)

Perspective preference and spatial learning: An eye movement investigation. - Masashi Sugimoto; Takatsugu Kojima; Hiroyuki Tsuda; Shogo Kajimura; Ayae Iwamoto; Yuki Sato; Takashi Kusumi (CogSci, 2013)

Implementation of a Grating-type Spatial Optical Switch based on Phase Change Material and its Static Measurement. - Xiaomin Wang; Masashi Kuwahara; Hitoshi Kawashima; Hiroyuki Tsuda (PHOTOPTICS, 2013)

MEMS mirror with slot structures suitable for flexible-grid WSS. - Keisuke Sorimoto; Hitoshi Kawashima; Masahiko Mori; Toshifumi Hasama; Hiroshi Ishikawa 006; Hiroyuki Tsuda; Hisato Uetsuka (IEICE Electron. Express, 2013)

An obstetric forceps contouring the head surface to improve gripping capability in delivery assistance. - Masaki Chino; Yoshikazu Nakajima; Akira Bekku; Hiroyuki Tsuda; Tomomi Kotani; Fumitaka Kikkawa (BioRob, 2014)

Small-sized Mach-Zehnder interferometer optical switch using thin film Ge2Sb2Te5 phase-change material. - Takumi Moriyama; Hitoshi Kawashima; Masashi Kuwahara; Xiaomin Wang; Hideaki Asakura; Hiroyuki Tsuda (OFC, 2014)

Ultra-compact, self-holding asymmetric Mach-Zehnder interferometer switch using Ge2Sb2Te5 phase-change material. - Takumi Moriyama; Daiki Tanaka; Paridhi Jain 002; Hitoshi Kawashima; Masashi Kuwahara; Xiaomin Wang; Hiroyuki Tsuda (IEICE Electron. Express, 2014)

Design and characterization of an arrayed-waveguide grating router with an interleave-chirped array. - Hideaki Asakura; Hiroyuki Tsuda (IEICE Electron. Express, 2015)

Evaluation of the phase error in Si-wire arrayed-waveguide gratings fabricated by ArF-immersion photolithography. - Kyosuke Muramatsu; Hideaki Asakura; Keijiro Suzuki; Ken Tanizawa; Munehiro Toyama; Minoru Ohtsuka; Nobuyuki Yokoyama; Kazuyuki Matsumaro; Miyoshi Seki; Keiji Koshino; Kazuhiro Ikeda; Shu Namiki; et al. (IEICE Electron. Express, 2015)

Amplitude trimming of Si waveguides using phase change material. - Ryutaro Eguchi; Hideaki Asakura; Yasuro Shimazaki; Takumi Moriyama; Ghanshyam Singh; Hiroyuki Tsuda (IEICE Electron. Express, 2016)

6.4-THz-spacing, 10-channel cyclic arrayed waveguide grating for T- and O-band coarse WDM. - Nazirul Afham Idris; Hiroyuki Tsuda (IEICE Electron. Express, 2016)

Experimental Demonstration of 4K-UHD Video Transmission Using T-Band Wavelength Routing System for Passive Optical Local Area Networks. - Ryogo Kubo; Hiroyuki Tsuda; Makoto Sudo; Tadashi Hajikano; Yasunori Tomomatsu; Katsumi Yoshizawa (ECOC, 2017)

Wavelength-Selective External-Cavity Laser Using an Optical Switch Integrated Arrayed-Waveguide Grating for T-band Communications. - Yudai Okuno; Hideki Shibutani; Katsumi Yoshizawa; Yasunori Tomomatsu; Hiroyuki Tsuda (ECOC, 2017)

Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch. - Koki Sugiyama; Takafumi Chiba; Ken Tanizawa; Keijiro Suzuki; Takayuki Kawashima; Shojiro Kawakami; Kazuhiro Ikeda; Hitoshi Kawashima; Hiroshi Takahashi; Hiroyuki Tsuda (IEICE Electron. Express, 2017)

T/O-band Wavelength Routing System Using Quantum Dot Semiconductor Devices and 1081-Channel AWG Router. - Ryogo Kubo; Takuto Fujimoto; Takahiro Shobudani; Yudai Okuno; Masaki Suzuki; Hiroyuki Tsuda; Makoto Sudo; Tadashi Hajikano; Yasunori Tomomatsu; Katsumi Yoshizawa (OFC, 2018)

Spatial Mode Multiplexer for 35 Single Mode Fibers to the 7-Core, 5-Mode Fiber. - Hayata Kobayashi; Hiroyuki Tsuda (PSC, 2018)

Polarization Diversity Circuit Using Photonic Crystal Waveplates for 1.2-μm Quantum Dot Semiconductor Optical Amplifiers. - Yudai Okuno; Koki Sugiyama; Tadashi Hajikano; Yasunori Tomomatsu; Katsumi Yoshizawa; Hiroyuki Tsuda (PSC, 2018)

Low-Crosstalk Multistage Silicon Wavelength Multi/Demultiplexer. - Katsutaka Sato; Hiroyuki Tsuda (PSC, 2018)

Demonstration of 10-Gbit/s transmission over G.652 fiber for T-band optical access systems using quantum-dot semiconductor devices. - Ryogo Kubo; Marino Matsunaga; Takahiro Shobudani; Takuto Fujimoto; Hiroyuki Tsuda; Makoto Sudo; Tadashi Hajikano; Yasunori Tomomatsu; Katsumi Yoshizawa (IEICE Electron. Express, 2018)

Silicon photonics based 1 × 2 wavelength selective switch using fold-back arrayed-waveguide gratings. - Fumi Nakamura; Hideaki Asakura; Keijiro Suzuki; Ken Tanizawa; Minoru Ohtsuka; Nobuyuki Yokoyama; Kazuyuki Matsumaro; Miyoshi Seki; Keiji Koshino; Kazuhiro Ikeda; Shu Namiki; Hitoshi Kawashima; et al. (IEICE Electron. Express, 2018)

Spatial Mode Multiplexer for 42 Single Mode Fibers to the 7-Core, 6-Mode Fiber. - Hayata Kobayashi; Hiroyuki Tsuda (OECC/PSC, 2019)

Multistage Silicon Wavelength Multi/Demultiplexer using an Arrayed-Waveguide Grating and Bragg Grating Filters. - Katsutaka Sato; Hiroyuki Tsuda (OECC/PSC, 2019)

S-, C- and L-Band Photonic Integrated Wavelength Selective Switch. - Rafael Magalhães Gomes Kraemer; Fumi Nakamura; Hiroyuki Tsuda; Antonio Napoli; Nicola Calabretta (ECOC, 2020)

High Extinction Ratio and Low Crosstalk C and L-Band Photonic Integrated Wavelength Selective Switching. - Rafael Magalhães Gomes Kraemer; Fumi Nakamura; Yu Wang; Hiroyuki Tsuda; Nicola Calabretta (ICTON, 2020)

Experimental Assessments of a Flexible Optical Data Center Network Based on Integrated Wavelength Selective Switch. - Xuwei Xue; Fumi Nakamura; Kristif Prifti; Bitao Pan; Fulong Yan; Fu Wang; Xiaotao Guo; Hiroyuki Tsuda; Nicola Calabretta (OFC, 2020)

Silicon photonics platforms for optical communication systems, outlook on future developments. - Hiroyuki Tsuda (IEICE Electron. Express, 2020)

Broadband Optical Packet Generation by Multiplexing Low- and High-Frequency Signals. - Tatsuo Furuya; Hiroyuki Tsuda (OECC/PSC, 2022)

Design of a Hybrid Wavelength Selective Crossconnect Utilizing a Silicon Optical Switch Array. - Yuki Moriya; Fumi Nakamura; Kunio Kobayashi; Hitoshi Kawashima; Haoshuo Chen; Hiroyuki Tsuda (OECC/PSC, 2022)

Proposal for a Highly Reliable In-Vehicle Optical Network: SiPhON (Si-Photonics-Based In-Vehicle Optical Network). - Hiroyuki Tsuda; Ryogo Kubo; Tatsuo Furuya; Masayuki Iwase; Masahito Morimoto; Hisashi Kondo; Yasushi Amamiya; Yoshiaki Nakano; Takuo Tanemura; Masayuki Murata 001; Shin'ichi Arakawa; Naokatsu Yamamoto; et al. (OECC/PSC, 2022)

Design of an optical triode switch using phase-change material. - Kenta Sakamoto; Hiroyuki Tsuda (IEICE Electron. Express, 2022)

Demonstration of 10 Gbps Packet Transmission in Si-Photonics-Based In-Vehicle Optical Network (SiPhON). - Yutaka Hoshiyama; Satoki Kawanishi; Hiroyuki Tsuda (PSC, 2023)

+30.8 dBm, IM-DD, 32 Gbit/s High Power Optical Transmission with a 4-km Photonic Bandgap Fiber. - Shumpei Kimura; Takeshi Takagi; Kazunori Mukasa; Hiroyuki Tsuda (PSC, 2023)

Novel Coupling Structure with an Angled Cut Fiber and a Tapered Silicon Waveguide Suitable for Surface Mount Large Port Count Applications. - Hayato Sasazawa; Daisuke Nakagawa; Hiroyuki Tsuda (PSC, 2023)

An Optical Wavelength Filter with Reduced Crosstalk Consisting of a Si Arrayed-Waveguide Grating and Bragg Tunable Grating Filters. - Yuta Yagi; Yuta Takai; Hiroyuki Tsuda (PSC, 2023)

Broadband optical packet generation by multiplexing signals using a bias tee. - Tatsuo Furuya; Hiroyuki Tsuda (IEICE Electron. Express, 2023)

Newly structured Hollow-Core Fiber and its open innovation field for Power over fiber, Radio over fiber and ultra-low latency application (Invited talk). - Naoaki Yamanaka; Satoru Okamoto; Hiroyuki Tsuda; Motoharu Matsuura; Kazunori Mukasa (ICTON, 2024)

Silicon monolithic wavelength selective switch utilizing arrayed waveguide gratings and Bragg grating filters. - Yuki Moriya; Yuta Yagi; Yuta Mizoguchi; Hiroyuki Tsuda (IEICE Electron. Express, 2024)

Very-low-delay massive wavelength division multiplexed optical network using Newly structured hollow-core fiber and its application (Invited talk). - Naoaki Yamanaka; Satoru Okamoto; Hiroyuki Tsuda; Takashi Miyamura; Motoharu Matsuura; Kazunori Mukasa (ICNC, 2025)

Demonstration of High-Power PON for Higher Split Ratio and Optical Powering Using a Hollow-Core Fiber. - Hironori Yamaji; Natsuhiro Yamada; Takeshi Takagi; Kazunori Mukasa; Satoru Okamoto; Hiroyuki Tsuda; Naoaki Yamanaka; Motoharu Matsuura (OFC, 2025)