Keijiro Suzuki

58 papers Journal 9Unranked 49

Year	Rank	Type	Title / Venue / Authors
2025	—	`conf`	Full C-band Two-Dimensional Beam-Steering Silicon PIC and 15.36-Tbit/s Free-Space Optical Transmission. OFC Tomoya Yoshida, Takashi Inoue, Yuki Atsumi, Ryosuke Matsumoto, Ryotaro Konoike, Kazuhiro Ikeda, Keijiro Suzuki
2025	—	`conf`	Input and Output Port-Adjacent Silicon Photonics PILOSS Switch for Wafer-Scale Optical Interconnections. OFC Siim Heinsalu, Ryotaro Konoike, Keijiro Suzuki, Kazuhiro Ikeda
2024	—	`conf`	Cost-effective ROADM Using Wide-bandwidth Silicon Tunable Ring Filter for Drop Operation. OFC Ryosuke Matsumoto, Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, Takashi Inoue, Kazuhiro Ikeda, Shu Namiki, Ken-ichi Sato
2024	—	`conf`	Monolithic Silicon Photonic Few-mode Waveguide with Satellite Structures for Athermal Spectral Filtering. OFC Ryotaro Konoike, Takayuki Kurosu, Guangwei Cong, Keijiro Suzuki, Kazuhiro Ikeda, Shu Namiki
2024	—	`conf`	Reinforced Q-Learning Enabled Automatic Blind Working Wavelength Alignment Against Wide Input-Wavelength Shifts and Temperature Variations for Silicon Photonic Vernier Ring Filters. OFC Guangwei Cong, Ryotaro Konoike, Keijiro Suzuki, Noritsugu Yamamoto, Rai Kou, Yuriko Maegami, Morifumi Ohno, Kazuhiro Ikeda, Shu Namiki, Koji Yamada
2023	J	`jnl`	Broadband Port-Selective Silicon Beam Scanning Device for Free-Space Optical Communication. IEICE Trans. Electron. Yuki Atsumi, Tomoya Yoshida, Ryosuke Matsumoto, Ryotaro Konoike, Youichi Sakakibara, Takashi Inoue, Keijiro Suzuki
2023	—	`conf`	Core-to-Core Switching Module for 4-Core MCFs Using Silicon Photonics Matrix Switch Incorporating Silicon Vertically Curved Optical Coupler. OFC Tomoya Yoshida, Yuki Atsumi, Emiko Omoda, Katsuya Kito, Katsuhiro Iwasaki, Yusuke Kinoshita, Tomoaki Kiriyama, Ryotaro Konoike, Keijiro Suzuki, Ryosuke Matsumoto, Takashi Inoue, Kazuhiro Ikeda, Takashi Kato, Youichi Sakakibara
2023	—	`conf`	Fast (<9.4 μs) Full-C-Band Tuning of Silicon Photonics Double-Ring Filters using Feed-Forward Control. OFC Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, Ryosuke Matsumoto, Kazuhiro Ikeda, Ken-ichi Sato
2023	—	`conf`	Free-Space Signal Transmission Using Optical Beam Scanning Device Incorporating Broadband Silicon Surface Optical Couplers. OFC Yuki Atsumi, Tomoya Yoshida, Ryosuke Matsumoto, Ryotaro Konoike, Youichi Sakakibara, Takashi Inoue, Keijiro Suzuki
2023	J	`jnl`	Metropolitan Area Network Model Design Using Regional Railways Information for Beyond 5G Research. IEICE Trans. Commun. Takuji Tachibana, Yusuke Hirota, Keijiro Suzuki, Takehiro Tsuritani, Hiroshi Hasegawa
2023	—	`conf`	Performance Verification of 7, 424 × 7, 424 Optical Switch Offering 1.4 μs Switching Time. OFC Ryosuke Matsumoto, Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, Takashi Inoue, Kazuhiro Ikeda, Shu Namiki, Ken-ichi Sato
2022	—	`conf`	Demonstration of Port-Selective Beam Scanner Incorporating Silicon Vertically Curved Waveguide Antenna Arrays. OECC/PSC Yuki Atsumi, Tomoya Yoshida, Ryosuke Matsumoto, Ryotaro Konoike, Youichi Sakakibara, Takashi Inoue, Keijiro Suzuki
2022	—	`conf`	Fully-loaded 32×32 silicon thermo-optic switches for disaggregated computing. OECC/PSC Ryosuke Matsumoto, Ryotaro Konoike, Keijiro Suzuki, Hiroyuki Matsuura, Kazuhiro Ikeda, Takashi Inoue, Shu Namiki
2022	—	`conf`	Path-Independent Insertion-Loss (PILOSS) 8 × 8 Silicon Photonics Switch with <8 nsec Switching Time. OFC Ryotaro Konoike, Keijiro Suzuki, Kazuhiro Ikeda
2022	—	`conf`	Progress and Future Prospect of Silicon Photonics Based Large Scale Optical Switches. OECC/PSC Kazuhiro Ikeda, Keijiro Suzuki, Ryotaro Konoike, Shu Namiki, Hitoshi Kawashima
2022	J	`jnl`	Prospects and challenges of optical switching technologies for intra data center networks. JOCN Ken-ichi Sato, Hiroyuki Matsuura, Ryotaro Konoike, Keijiro Suzuki, Kazuhiro Ikeda, Shu Namiki
2022	—	`conf`	Recent Advances in Large-scale Optical Switches Based on Silicon Photonics. OFC Keijiro Suzuki, Ryotaro Konoike, Hiroyuki Matsuura, Ryosuke Matsumoto, Takashi Inoue, Shu Namiki, Hitoshi Kawashima, Kazuhiro Ikeda
2022	—	`conf`	Scalable and Fast Optical Circuit Switch Exploiting Colorless Coherent Detection. OFC Ryosuke Matsumoto, Ryotaro Konoike, Keijiro Suzuki, Takashi Inoue, Shu Namiki, Ken-ichi Sato
2021	—	`conf`	5.5%-Δ-PLC/Silicon Photonics Hybrid Wavelength MUX/DEMUX-and-Switch Device. OFC Kazuhiro Ikeda, Noritaka Matsubara, Junichi Hasegawa, Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, Hitoshi Kawashima
2021	—	`conf`	Fast Optical Switch Utilizing Coherent Detection Enabled by Cooperative Filtering of Transmission Signal and Local Oscillator (LO) Wavelength Sourced from an LO Bank. OFC Ryosuke Matsumoto, Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, Takashi Inoue, Kazuhiro Ikeda, Shu Namiki, Ken-ichi Sato
2021	—	`conf`	Fully-Loaded Operation of 0.29-pJ/bit Wall-plug Efficiency, 81.9-Tb/s Throughput 32 × 32 Silicon Photonics Switch. OFC Ryosuke Matsumoto, Ryotaro Konoike, Keijiro Suzuki, Hiroyuki Matsuura, Kazuhiro Ikeda, Takashi Inoue, Shu Namiki
2020	—	`conf`	5.7-dB Fiber-to-Fiber Loss 8 × 8 Silicon Photonics Switch with Port-Alternated Switch-and-Select Architecture. OFC Ryotaro Konoike, Keijiro Suzuki, Hitoshi Kawashima, Kazuhiro Ikeda
2020	—	`conf`	Large-Scale and Fast Optical Circuit Switch for Coherent Detection Using Tunable Local Oscillators Formed with Wavelength Bank and Widely-Tunable Silicon Ring Filters. ECOC Ryosuke Matsumoto, Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, Takashi Inoue, Yojiro Mori, Kazuhiro Ikeda, Shu Namiki, Ken-ichi Sato
2020	—	`conf`	O-Band Strictly Non-Blocking 8 × 8 Silicon-Photonics Switch. OFC Keijiro Suzuki, Ryotaro Konoike, Guangwei Cong, Koji Yamada, Shu Namiki, Hitoshi Kawashima, Kazuhiro Ikeda
2020	—	`conf`	Polarization-insensitive low-crosstalk 8×8 silicon photonics switch with 9×13.5 cm ECOC Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, H. Kawashima, Kazuhiro Ikeda
2020	—	`conf`	Scalable and Fast Optical Circuit Switch Created with Silicon-Photonic Tunable-Filter-Based Local Oscillator Bank and Colorless Coherent Detection. OFC Ryosuke Matsumoto, Takashi Inoue, Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, Yojiro Mori, Kazuhiro Ikeda, Shu Namiki, Ken-ichi Sato
2020	J	`jnl`	Strictly Non-Blocking Silicon Photonics Switches. IEICE Trans. Electron. Keijiro Suzuki, Ryotaro Konoike, Satoshi Suda, Hiroyuki Matsuura, Shu Namiki, Hitoshi Kawashima, Kazuhiro Ikeda
2019	—	`conf`	A 300-mm-wafer silicon photonics technology for advanced information systems. ISDCS Koji Yamada, Guangwei Cong, Makoto Okano, Yuriko Maegami, Morifumi Ohno, Keijiro Suzuki, Satoshi Suda, Ryotaro Konoike, Kazuhiro Ikeda, Hitoshi Kawashima, Tsuyoshi Horikawa, Shu Namiki, Masahiko Mori, Shota Kita, Kengo Nozaki, Akihiko Shinya, Masaya Notomi
2019	—	`conf`	Low-Crosstalk Bandwidth Expansion in $32\times 32$ Silicon Optical Switch with Port-Exchanged Mach-Zehnder Switch. OECC/PSC Keijiro Suzuki, Ryotaro Konoike, Satoshi Suda, Hiroyuki Matsuura, Shu Namiki, Hitoshi Kawashima, Kazuhiro Ikeda
2019	—	`conf`	Low-Loss, Low-Crosstalk, and Large-Scale Silicon Photonics Switch. OFC Keijiro Suzuki, Ryotaro Konoike, Satoshi Suda, Hiroyuki Matsuura, Shu Namiki, Hitoshi Kawashima, Kazuhiro Ikeda
2019	—	`conf`	Polarization-Diversity 32 × 32 Si Photonics Switch with Non-Duplicate Diversity Circuit in Double-Layer Platform. OFC Keijiro Suzuki, Ryotaro Konoike, Nobuyuki Yokoyama, Miyoshi Seki, Minoru Ohtsuka, Shigeru Saitoh, Satoshi Suda, Hiroyuki Matsuura, Koji Yamada, Shu Namiki, Hitoshi Kawashima, Kazuhiro Ikeda
2018	—	`conf`	32-Port 5.5%-Δ Silica-Based Connecting Device for Low-Loss Coupling between SMFs and Silicon Waveguides. OFC Junichi Hasegawa, Kazuhiro Ikeda, Keijiro Suzuki, Shintaro Yamasaki, Go Kobayashi, Masanori Takahashi, Hitoshi Kawashima
2018	—	`conf`	Fast Frequency Tuning of Silicon-Photonic Thermo-optic MZI Filters using "Turbo Pulse" Method. OFC Hiroyuki Matsuura, Keijiro Suzuki, Satoshi Suda, Kazuhiro Ikeda, Hitoshi Kawashima, Shu Namiki
2018	—	`conf`	Fast Optical Circuit Switch Using Monolithically Integrated Silicon-Photonic Space Switch and Wavelength-Tuneable Filter. ECOC Yojiro Mori, Mungun-Erdene Ganbold, Ryuta Shiraki, Keijiro Suzuki, Hiroyuki Matsuura, Hitoshi Kawashima, Shu Namiki, Kazuhiro Ikeda, Ken-ichi Sato
2018	—	`conf`	Fully-Loaded and Cascaded Operation of Polarization-Diversity 8 × 8 Silicon Photonics Optical Switch with 11-ch × 32/44-Gbaud DP-16QAM WDM Transmission. OFC Takayuki Kurosu, Takashi Inoue, Keijiro Suzuki, Satoshi Suda, Shu Namiki
2018	—	`conf`	In-line Optical Amplification for Silicon Photonics Platform by Flip-Chip Bonded InP-SOAs. OFC Takeshi Matsumoto, Teruo Kurahashi, Ryotaro Konoike, Ken Tanizawa, Keijiro Suzuki, Ayahito Uetake, Kazumasa Takabayashi, Kazuhiro Ikeda, Hitoshi Kawashima, Suguru Akiyama, Shigeaki Sekiguchi
2018	—	`conf`	Lossless Operation of SOA-Integrated Silicon Photonics Switch for 8 × 32-Gbaud 16-QAM WDM Signals. OFC Ryotaro Konoike, Keijiro Suzuki, Takashi Inoue, Takeshi Matsumoto, Teruo Kurahashi, Ayahito Uetake, Kazumasa Takabayashi, Suguru Akiyama, Shigeaki Sekiguchi, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2018	—	`conf`	Low Insertion Loss and Power Efficient 32 × 32 Silicon Photonics Switch with Extremely-High-Δ PLC Connector. OFC Keijiro Suzuki, Ryotaro Konoike, Junichi Hasegawa, Satoshi Suda, Hiroyuki Matsuura, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2018	—	`conf`	Next-Generation ROADM Employing Bandwidth-Adaptive Silicon-Photonic Filters for Flexible Drop Operation. OFC Yojiro Mori, Koh Ueda, Keijiro Suzuki, Hiroyuki Matsuura, Ken Tanizawa, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashiwa, Ken-ichi Sato
2018	—	`conf`	Reconfigurable 3-Channel All-Optical MIMO Circuit on Silicon Based on Multi-Plane Light Conversion. OFC Rui Tang, Takuo Tanemura, Samir Ghosh, Keijiro Suzuki, Ken Tanizawa, Kazuhiro Ikeda, Hitoshi Kawashima, Yoshiaki Nakano
2018	J	`jnl`	Silicon photonics based 1 × 2 wavelength selective switch using fold-back arrayed-waveguide gratings. IEICE Electron. Express Fumi Nakamura, Hideaki Asakura, Keijiro Suzuki, Ken Tanizawa, Minoru Ohtsuka, Nobuyuki Yokoyama, Kazuyuki Matsumaro, Miyoshi Seki, Keiji Koshino, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima, Hiroyuki Tsuda
2018	—	`conf`	Ultra-Compact Silicon Photonics Switch with Ultra-Dense Thermo-Optic MZI Matrix and Multi-Layer Wiring. ECOC Ryotaro Konoike, Keijiro Suzuki, Shu Namiki, Hitoshi Kawashima, Kazuhiro Ikeda
2017	—	`conf`	2.5-dB loss, 100-nm Operating Bandwidth, and Low Power Consumption Strictly-Non-Blocking 8 × 8 Si Switch. ECOC Keijiro Suzuki, Ken Tanizawa, Satoshi Suda, Hiroyuki Matsuura, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2017	—	`conf`	Accelerating switching speed of thermo-optic MZI silicon-photonic switches with "turbo pulse" in PWM control. OFC Hiroyuki Matsuura, Satoshi Suda, Ken Tanizawa, Keijiro Suzuki, Kazuhiro Ikeda, Hitoshi Kawashima, Shu Namiki
2017	—	`conf`	Fully integrated non-duplicate polarization-diversity 8 × 8 Si-wire PILOSS switch. OFC Ken Tanizawa, Keijiro Suzuki, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2017	J	`jnl`	Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch. IEICE Electron. Express Koki Sugiyama, Takafumi Chiba, Ken Tanizawa, Keijiro Suzuki, Takayuki Kawashima, Shojiro Kawakami, Kazuhiro Ikeda, Hitoshi Kawashima, Hiroshi Takahashi, Hiroyuki Tsuda
2017	—	`conf`	Silicon-photonics polarization-insensitive broadband strictly-non-blocking 8 × 8 blade switch. OFC Keijiro Suzuki, Ken Tanizawa, Satoshi Suda, Hiroyuki Matsuura, Takashi Inoue, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2016	—	`conf`	In-line optical amplification for Si waveguides on 1×8 splitter and selector by flip-chip bonded InP-SOAs. OFC Takeshi Matsumoto, Teruo Kurahashi, Ken Tanizawa, Keijiro Suzuki, Ayahito Uetake, Kazumasa Takabayashi, Kazuhiro Ikeda, Hitoshi Kawashima, Suguru Akiyama
2016	—	`conf`	Multi-port optical switch based on silicon photonics. OFC Hitoshi Kawashima, Keijiro Suzuki, Ken Tanizawa, Satoshi Suda, Guangwei Cong, Hiroyuki Matsuura, Shu Namiki, Kazuhiro Ikeda
2016	—	`conf`	Novel PILOSS port assignment for compact polarization-diversity Si-wire optical switch. OFC Ken Tanizawa, Keijiro Suzuki, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2015	—	`conf`	32×32 strictly non-blocking Si-wire optical switch on ultra-small die of 11×25 mm OFC Ken Tanizawa, Keijiro Suzuki, Munehiro Toyama, Minoru Ohtsuka, Nobuyuki Yokoyama, Kazuyuki Matsumaro, Miyoshi Seki, Keiji Koshino, Toshio Sugaya, Satoshi Suda, Guangwei Cong, Toshio Kimura, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2015	J	`jnl`	Evaluation of the phase error in Si-wire arrayed-waveguide gratings fabricated by ArF-immersion photolithography. IEICE Electron. Express Kyosuke Muramatsu, Hideaki Asakura, Keijiro Suzuki, Ken Tanizawa, Munehiro Toyama, Minoru Ohtsuka, Nobuyuki Yokoyama, Kazuyuki Matsumaro, Miyoshi Seki, Keiji Koshino, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima, Hiroyuki Tsuda
2015	—	`conf`	In-band OSNR monitor based on 3 × 3 Si-wire MMI coupler. ECOC Ken Tanizawa, Keisuke Sorimoto, Keijiro Suzuki, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2015	—	`conf`	Power-efficient gray-scale control of silicon thermo-optic phase shifters by pulse width modulation using monolithically integrated MOSFET. OFC Guangwei Cong, Takashi Matsukawa, Keijiro Suzuki, Ken Tanizawa, Sang-Hun Kim, Tadashi Chiba, Hirofumi Tadokoro, Masashi Yanagihara, Morifumi Ohno, Haruhiko Kuwatsuka, Yasushi Igarashi, Meishoku Masahara, Hiroshi Ishikawa, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2014	—	`conf`	First demonstration of ultra-low-energy hierarchical multi-granular optical path network dynamically controlled through NSI-CS for video related applications. ECOC Junya Kurumida, Kiyo Ishii, Atsuko Takefusa, Yusuke Tanimura, Shigeyuki Yanagimachi, Hitoshi Takeshita, Akio Tajima, Kiyoshi Fukuchi, H. Honma, W. Odashima, Hiroshi Onaka, Ken Tanizawa, Keijiro Suzuki, Satoshi Suda, Kazuhiro Ikeda, H. Kawashima, H. Uetsuka, Hiroyuki Matsuura, Haruhiko Kuwatsuka, Ken-ichi Sato, Tomohiro Kudoh, Shu Namiki
2014	J	`jnl`	Multiport optical switches integrated on Si photonics platform. IEICE Electron. Express Keijiro Suzuki, Guangwei Cong, Ken Tanizawa, Sang-Hun Kim, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima
2014	—	`conf`	Robust design of 3-dB directional coupler with weak gap sensitivity for silicon wire waveguide. OFC Guangwei Cong, Keijiro Suzuki, Sang-Hun Kim, Ken Tanizawa, Shu Namiki, Hitoshi Kawashima
2013	J	`jnl`	Photonic crystal slow light devices fabricated by CMOS-compatible process. IEICE Electron. Express Toshihiko Baba, Hong C. Nguyen, Norihiro Ishikura, Keijiro Suzuki, Mizuki Shinkawa, Ryo Hayakawa, Keisuke Kondo