Kunimasa Saitoh

Publication Activity (10 Years)

Years Active: 2005-2024
Publications (10 Years): 44

Top Topics

Stress Distribution

Top Venues

IEICE Electron. Express

Publications

Kodai Nakamura, Takanori Sato, Kunimasa Saitoh
A silicon mode multiplexer based on the three-stage cascaded wavelength insensitive coupler for MDM-WDM transmission system. IEICE Electron. Express 21 (7) (2024)
Gustavo Ocampo, Yoshimichi Amma, Kunimasa Saitoh
Stress Distribution Effects on Polarization-Mode Dispersion in Multi-Core Fibers. OFC (2024)
Takeshi Fujisawa, Kunimasa Saitoh
Fabrication-tolerant, 2-mode, 4λ multiplexer based on Si waveguides for beyond Tbit/s optical Ethernet. OFC (2023)
Han Wang, Takeshi Fujisawa, Takanori Sato, Masaki Wada, Takayoshi Mori, Taiji Sakamoto, Ryota Imada, Takashi Matsui, Kazuhide Nakajima, Kunimasa Saitoh
and E-LP tapered mode converters using fast quasiadiabatic dynamics. IEICE Electron. Express 20 (23) (2023)
Gustavo Ocampo, Takanori Sato, Takeshi Fujisawa, Mayu Nakagawa, Kunimasa Saitoh
Relationship between Polarization Mode Dispersion and Crosstalk in Heterogeneous Multi-core Fibers with Different Cladding Diameters. OFC (2023)
Takeshi Fujisawa, Takayoshi Mori, Junji Sakamoto, Yoko Yamashita, Taiji Sakamoto, Ryota Imada, Ryoto Ima, Takanori Sato, Kei Watanabe, Ryoichi Kasahara, Toshikazu Hashimoto, Kazuhide Nakajima, Kunimasa Saitoh
Silica-PLC based mode-dependent-loss equalizer for two LP mode transmission. OFC (2022)
Gustavo Ocampo, Takanori Sato, Takeshi Fujisawa, Yoshimichi Amma, Kunimasa Saitoh
Analysis of Crosstalk Dependence on Cladding Diameter in Heterogeneous Multi-core Fibers by Considering Polarization-mode Coupling Effects. OECC/PSC (2022)
Takuya Mitarai, Takeshi Fujisawa, Takuya Okimoto, Naoya Kono, Naoki Fujiwara, Yusuke Sawada, Taichi Muratsubaki, Takanori Sato, Kunimasa Saitoh, Hideki Yagi
Compact Power Splitters with Mosaic-based Structure Designed by Bayesian Direct-binary-search Method. OECC/PSC (2022)
Kodai Nakamura, Takeshi Fujisawa, Takanori Sato, Kunimasa Saitoh
High-tolerance CWDM4 wavelength multiplexer based on 2×2/2×1 MZ filters with polarization multiplexing. IEICE Electron. Express 18 (8) (2021)
Yusuke Sawada, Takeshi Fujisawa, Takanori Sato, Kunimasa Saitoh
Experimental Demonstration of Broadband Silicon 4-Mode (de)Multiplexer Designed by Wavefront-Matching Method. OFC (2021)
Kunimasa Saitoh
Multi-core Fiber Technology for SDM: Coupling Mechanisms and Design. OFC (2021)
Takeshi Fujisawa, Taiji Sakamoto, Masashi Miyata, Takashi Matsui, Toshikazu Hashimoto, Ryoichi Kasahara, Kazuhide Nakajima, Kunimasa Saitoh
Wavefront-Matching-Method-Designed Six-Mode-Exchanger Based on Grating-Like Waveguide on Silica-PLC Platform. OFC (2020)
Naoto Sugawara, Takeshi Fujisawa, Kodai Nakamura, Yusuke Sawada, Taiji Sakamoto, Takashi Matsui, Kazuhide Nakajima, Kunimasa Saitoh
Modal Amplitude and Phase Estimation of NFP of Six-Mode FMF Based on Artificial Neural Network with the Help of Grey-Wolf-Optimizer. ECOC (2020)
Kodai Nakamura, Takeshi Fujisawa, Taiji Sakamoto, Takashi Matsui, Kazuhide Nakajima, Kunimasa Saitoh
A Tunable Mode Divider Based on Wavelength Insensitive Coupler using Thermo-Optic Effect for Gain-Equalization in MDM Network. OFC (2020)
Junya Takano, Takeshi Fujisawa, Yusuke Sawada, Kunimasa Saitoh
Low-Loss Silicon 2 × 4λ Multiplexers Composed of On-Chip Polarization-Splitter-Rotator and 2 × 2 and 2 × 1 Mach-Zehnder Filters for 400GbE. OFC (2020)
Kunimasa Saitoh
Few-mode Multi-core Fibres: Weakly-coupling and Randomly-coupling. ECOC (2020)
Naoto Sugawara, Misa Kudo, Takeshi Fujisawa, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Kazuhide Nakajima, Kunimasa Saitoh
3-Mode PLC-Based Mode Dependent Loss Equalizer in MDM Transmission. OECC/PSC (2019)
Benjamin J. Puttnam, Georg Rademacher, Ruben S. Luis, Hideaki Furukawa, Andrew Ross-Adams, Simon Gross, Michael J. Withford, Nicolas Riesen, Yusuke Sasaki, Kunimasa Saitoh, Kazuhike Aikawa, Yoshinari Awaji, Naoya Wada
Dynamic Crosstalk Study in a Few-Mode-Multi-Core Fiber. OFC (2019)
Junya Takano, Takeshi Fujisawa, Takanori Sato, Yusuke Sawada, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Kazuhide Nakajima, Kunimasa Saitoh
Low-Loss and Fabrication-Tolerant Si Four-Wavelength Multiplexer using Higher-Order Mode for 100/400GbE. OFC (2019)
Motoki Shirata, Misa Kudo, Takeshi Fujisawa, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Kazuhide Nakajima, Kunimasa Saitoh
A Design of Low MDL Scrambling-type PLC 6-mode Multiplexer. OECC/PSC (2019)
Kenta Nishimura, Takanori Sato, Takeshi Fujisawa, Yoshimichi Amma, Katsuhiro Takenaga, Kazuhiko Aikawa, Kunimasa Saitoh
Cladding Diameter Dependence of Inter-Core Crosstalk in Heterogeneous Multicore Fibers. OECC/PSC (2019)
Yusuke Sawada, Takeshi Fujisawa, Takanori Sato, Kunimasa Saitoh
First Experimental Demonstration of Wavefront-Matching-Method-Designed Silicon Mode Converters. OFC (2019)
Yusuke Sawada, Takeshi Fujisawa, Takanori Sato, Kunimasa Saitoh
CMOS-compatible Si-wire polarization beam splitter based on wavelength-insensitive coupler. IEICE Electron. Express 16 (8) (2019)
Misa Kudo, Takeshi Fujisawa, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Kazuhide Nakajima, Kunimasa Saitoh
A Broadband Mode Divider with Arbitrary Branching Ratio Based on Wavelength-Insensitive Coupler. OFC (2019)
Takanori Sato, Takeshi Fujisawa, Kunimasa Saitoh
Ultra-Robust Design of Mode (De)Multiplexer Based on Asymmetrical Directional Coupler Using Wire and One-Side Rib Waveguides. OECC/PSC (2019)
Kohki Shibahara, Takayuki Mizuno, Doowhan Lee, Yutaka Miyamoto, Hirotaka Ono, Kazuhide Nakajima, Yoshimichi Amma, Katsuhiro Takenaga, Kunimasa Saitoh
Iterative Unreplicated Parallel Interference Canceler for MDL-Tolerant Dense SDM 12-Core×3-Mode Transmission Over 3000 km. ECOC (2018)
Ruben S. Luis, Georg Rademacher, Benjamin J. Puttnam, Tobias A. Eriksson, Hideaki Furukawa, Andrew Ross-Adams, Simon Gross, Michael J. Withford, Nicolas Riesen, Yusuke Sasaki, Kunimasa Saitoh, Kazuhiko Aikawa, Yoshinari Awaji, Naoya Wada
1.2 Pb/s Transmission Over a 160 µm Cladding, 4-Core, 3-Mode Fiber, Using 368 C+L band PDM-256-QAM Channels. ECOC (2018)
Taiji Sakamoto, Kunimasa Saitoh, Shota Saitoh, Yoshiteru Abe, Katsuhiro Takenaga, Azusa Urushibara, Masaki Wada, Takashi Matsui, Kazuhiko Aikawa, Kazuhide Nakajima
120 Spatial Channel Few-Mode Multi-Core Fibre with Relative Core Multiplicity Factor Exceeding 100. ECOC (2018)
Kohki Shibahara, Takayuki Mizuno, L. Doowhan, Yutaka Miyamoto, Hirotaka Ono, Kazuhide Nakajima, S. Saitoh, Katsuhiro Takenaga, Kunimasa Saitoh
DMD-Unmanaged Long-Haul SDM Transmission Over 2500-km 12-core × 3-mode MC-FMF and 6300-km 3-mode FMF Employing Intermodal Interference Cancelling Technique. OFC (2018)
Md. Nooruzzaman, Kunimasa Saitoh, Yusuke Sasaki, Katsuhiro Takenaga, Kazuhiko Aikawa, Toshio Morioka
Non-circular multi-core fibers for super-dense SDM. IEICE Electron. Express 15 (19) (2018)
Eri Taguchi, Takeshi Fujisawa, Yoko Yamashita, Shuntaro Makino, Nobutomo Hanzawa, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Kazuhide Nakajima, Fumihiko Yamamoto, Kunimasa Saitoh
A Review of PLC-Based Broadband Two-Mode Multi/Demultiplexer Designed by Wavefront Matching Method. IEICE Trans. Electron. (7) (2018)
Shuntaro Makino, Masahiro Suga, Takanori Sato, Takeshi Fujisawa, Kunimasa Saitoh
Ultimately low-loss and compact Si wire 90° waveguide bend composed of clothoid and normal curves for dense optical interconnect PICs. OFC (2017)
Shun Ohta, Takeshi Fujisawa, Shuntaro Makino, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Kazuhide Nakajima, Kunimasa Saitoh
Mach-Zehnder Mode/Wavelength (De)Multiplexer for WDM/MDM Optical Transmission. ECOC (2017)
Takeshi Fujisawa, Yoko Yamashita, Taiji Sakamoto, Takashi Matsui, Shuntaro Makino, Kyozo Tsujikawa, Kazuhide Nakajima, Kunimasa Saitoh
Scrambling-type three-mode multiplexer based on cascaded Y-branch waveguide with integrated mode rotator on PLC platform. OFC (2017)
Yuhei Ishizaka, Masaru Nagai, Takeshi Fujisawa, Kunimasa Saitoh
A photonic-plasmonic mode converter using mode-coupling-based polarization rotation for metal-inserted silicon platform. IEICE Electron. Express 14 (2) (2017)
Taiji Sakamoto, Kunimasa Saitoh, Shota Saitoh, Kohki Shibahara, Masaki Wada, Yoshiteru Abe, Azusa Urushibara, Katsuhiro Takenaga, Takayuki Mizuno, Takashi Matsui, Kazuhiko Aikawa, Yutaka Miyamoto, Kazuhide Nakajima
High Spatial Density Six-mode Seven-core Fibre for Repeated Dense SDM Transmission. ECOC (2017)
Kazuki Yoshida, Takeshi Fujisawa, Takanori Sato, Kunimasa Saitoh
Group Delay Spread Analysis of Few-Mode, Coupled 3-Core Fibres: Optimum Index Profile and Maximum Transmission Distance for Strong Coupling Regime. ECOC (2017)
Takayuki Kobayashi, Masanori Nakamura, Fukutaro Hamaoka, Kohki Shibahara, Takayuki Mizuno, Akihide Sano, H. Kawakami, Akira Isoda, Munehiko Nagatani, Hiroshi Yamazaki, Yutaka Miyamoto, Yoshimichi Amma, Yusuke Sasaki, Katsuhiro Takenaga, Kazuhiko Aikawa, Kunimasa Saitoh, Yongmin Jung, David J. Richardson, Klaus Pulverer, Marc Bohn, Md. Nooruzzaman, Toshio Morioka
1-Pb/s (32 SDM/46 WDM/768 Gb/s) C-band dense SDM transmission over 205.6-km of single-mode heterogeneous multi-core fiber using 96-Gbaud PDM-16QAM channels. OFC (2017)
Takeshi Fujisawa, Eri Taguchi, Taiji Sakamoto, Takashi Matsui, Yoko Yamashita, Kyozo Tsujikawa, Kazuhide Nakajima, Kunimasa Saitoh
One chip, PLC three-mode exchanger based on symmetric and asymmetric directional couplers with integrated mode rotator. OFC (2017)
Takeshi Fujisawa, Ren Tojo, Shota Saitoh, Shoichiro Matsuo, Kunimasa Saitoh
Extremely small group delay spread six-core fiber with air-holes for mode-division-multiplexing: A principal mode analysis. OFC (2016)
Takayuki Mizuno, Kohki Shibahara, Hirotaka Ono, Y. Abe, Yutaka Miyamoto, F. Ye, Toshio Morioka, Yusuke Sasaki, Yoshimichi Amma, Katsuhiro Takenaga, S. Matsuo, Kazuhiko Aikawa, Kunimasa Saitoh, Yongmin Jung, David J. Richardson, Klaus Pulverer, Marc Bohn, M. Yamada
32-core Dense SDM unidirectional transmission of PDM-16QAM signals over 1600 km using crosstalk-managed single-mode heterogeneous multicore transmission line. OFC (2016)
Kohki Shibahara, Takayuki Mizuno, Hidehiko Takara, H. Kawakami, D. Lee, Yutaka Miyamoto, S. Matsuo, Kunimasa Saitoh, M. Yamada
Space-time coding-assisted transmission for mitigation of MDL impact on mode-division multiplexed signals. OFC (2016)
Katsuhiro Takenaga, Shoichiro Matsuo, Kunimasa Saitoh, Toshio Morioka, Yutaka Miyamoto
High-density multicore fibers. OFC (2016)
Taiji Sakamoto, Takashi Matsui, Kunimasa Saitoh, S. Saitoh, Katsuhiro Takenaga, Takayuki Mizuno, Yoshiteru Abe, Kohki Shibahara, Y. Tobita, Shinji Matsuo, Kazuhiko Aikawa, Shinichi Aozasa, Kazuhide Nakajima, Yutaka Miyamoto
Low-loss and Low-DMD few-mode multi-core fiber with highest core multiplicity factor. OFC (2016)
Feihong Ye, Kunimasa Saitoh, Hidehiko Takara, Rameez Asif, Toshio Morioka
High-count multi-core fibers for space-division multiplexing with propagation-direction interleaving. OFC (2015)
Nobutomo Hanzawa, Kunimasa Saitoh, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Takeshi Fujisawa, Yuhei Ishizaka, Fumihiko Yamamoto
Demonstration of PLC-based six-mode multiplexer for mode division multiplexing transmission. ECOC (2015)
T. Fujisawa, Kunimasa Saitoh
A principal mode analysis of strongly-coupled 3-core fibres. ECOC (2015)
Yusuke Sasaki, S. Saitoh, Yoshimichi Amma, Katsuhiro Takenaga, S. Matsuo, Kunimasa Saitoh, Toshio Morioka, Yutaka Miyamoto
Quasi-single-mode homogeneous 31-core fibre. ECOC (2015)
S. Saitoh, Yusuke Sasaki, Katsuhiro Takenaga, M. Ohashi, Kunimasa Saitoh, Kazuhide Nakajima, Shinji Matsuo
Measurement of inter-core crosstalk in few-mode multicore fibre. ECOC (2015)
Taiji Sakamoto, Takashi Matsui, Kunimasa Saitoh, Shota Saitoh, Katsuhiro Takenaga, Shoichiro Matsuo, Yuki Tobita, Nobutomo Hanzawa, Kazuhide Nakajima, Fumihiko Yamamoto
Few-mode multi-core fibre with highest core multiplicity factor. ECOC (2015)
Kohki Shibahara, Takayuki Mizuno, Hidehiko Takara, Akihide Sano, H. Kawakami, D. Lee, Yutaka Miyamoto, Hirotaka Ono, Manabu Oguma, Yoshiteru Abe, Takayuki Kobayashi, Takashi Matsui, Ryohei Fukumoto, Yoshimichi Amma, T. Hosokawa, S. Matsuo, Kunimasa Saitoh, H. Nasu, Toshio Morioka
Dense SDM (12-core × 3-mode) transmission over 527 km with 33.2-ns mode-dispersion employing low-complexity parallel MIMO frequency-domain equalization. OFC (2015)
Kunimasa Saitoh
Multicore fiber technology. OFC (2015)
Shoichiro Matsuo, Katsuhiro Takenaga, Kunimasa Saitoh, Kazuhide Nakajima, Yutaka Miyamoto, Toshio Morioka
High-spatial-multiplicity multi-core fibres for future dense space-division-multiplexing system. ECOC (2015)
Yoshimichi Amma, Yusuke Sasaki, Katsuhiro Takenaga, S. Matsuo, J. Tu, Kunimasa Saitoh, Masanori Koshiba, Toshio Morioka, Yutaka Miyamoto
High-density multicore fiber with heterogeneous core arrangement. OFC (2015)
T. Mizuno, H. Takara, Kohki Shibahara, Yutaka Miyamoto, Manabu Oguma, Hirotaka Ono, Y. Abe, Takashi Matsui, S. Matsuo, Kunimasa Saitoh, Y. Kimura
Mode dependent loss equaliser and impact of MDL on PDM-16QAM few-mode fibre transmission. ECOC (2015)
Yusuke Sasaki, Yoshimichi Amma, Katsuhiro Takenaga, Shoichiro Matsuo, Kunimasa Saitoh, Masanori Koshiba
Few-mode multicore fibre with 36 spatial modes (Three modes (LP01, LP11a, LP11b) ×12 cores). ECOC (2014)
Takayuki Mizuno, Takayuki Kobayashi, Hidehiko Takara, Akihide Sano, Hiroto Kawakami, T. Nakagawa, Yutaka Miyamoto, Yoshiteru Abe, T. Goh, Manabu Oguma, Taiji Sakamoto, Yusuke Sasaki, Itaru Ishida, Katsuhiro Takenaga, Shoichiro Matsuo, Kunimasa Saitoh, Toshio Morioka
12-core × 3-mode dense space division multiplexed transmission over 40 km employing multi-carrier signals with parallel MIMO equalization. OFC (2014)
Nobutomo Hanzawa, Kunimasa Saitoh, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Takui Uematsu, Fumihiko Yamamoto
Four-mode PLC-based mode multi/demultiplexer with LP11 mode rotator on one chip for MDM transmission. ECOC (2014)
Takui Uematsu, Nobutomo Hanzawa, Kunimasa Saitoh, Yuhei Ishizaka, Kouhei Masumoto, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Fumihiko Yamamoto
PLC-type LP11 mode rotator with single-trench waveguide for mode-division multiplexing transmission. OFC (2014)
Tetsuya Hayashi, Tetsuya Nakanishi, Takashi Sasaki, Kunimasa Saitoh, Masanori Koshiba
Dependence of crosstalk increase due to tight bend on core layout of multi-core fiber. OFC (2014)
H. Uemura, Yusuke Sasaki, S. Nishimoto, Takui Uematsu, Katsuhiro Takenaga, K. Omichi, R. Goto, Shinji Matsuo, Kunimasa Saitoh
Mode multiplexer/demultiplexer based on a partially elongated multi-core fiber. OFC (2014)
Katsuhiro Takenaga, H. Uemura, Yusuke Sasaki, S. Nishimoto, Takui Uematsu, K. Omichi, R. Goto, S. Matsuo, Kunimasa Saitoh
Multicore fibre-based mode multiplexer/demultiplexer for three-mode operation of LP01, LP11a, and LP11b. ECOC (2014)
Fanting Kong, Kunimasa Saitoh, Devon Mcclane, Thomas W. Hawkins, Paul Foy, Guancheng Gu, Liang Dong
All-solid photonic bandgap fiber with record mode area. OFC/NFOEC (2013)
S. Matsuo, Yusuke Sasaki, I. Ishida, Katsuhiro Takenaga, Kunimasa Saitoh, Masanori Koshiba
Recent progress on multi-core fiber and few-mode fiber. OFC/NFOEC (2013)
Yusuke Sasaki, Yoshimichi Amma, Katsuhiro Takenaga, S. Matsuo, Kunimasa Saitoh, Masanori Koshiba
Investigation of crosstalk dependencies on bending radius of heterogeneous multicore fiber. OFC/NFOEC (2013)
Takui Uematsu, Kunimasa Saitoh, Nobutomo Hanzawa, Taiji Sakamoto, Takashi Matsui, Kyozo Tsujikawa, Masanori Koshiba
Low-loss and broadband PLC-type mode (de)multiplexer for mode-division multiplexing transmission. OFC/NFOEC (2013)
Katsuhiro Takenaga, Yoko Arakawa, Shoji Tanigawa, Ning Guan, Shoichiro Matsuo, Kunimasa Saitoh, Masanori Koshiba
An Investigation on Crosstalk in Multi-Core Fibers by Introducing Random Fluctuation along Longitudinal Direction. IEICE Trans. Commun. (2) (2011)
Shoichiro Matsuo, Katsuhiro Takenaga, Yoko Arakawa, Yusuke Sasaki, Shoji Tanigawa, Kunimasa Saitoh, Masanori Koshiba
Crosstalk behavior of multi-core fiber with structural parameter drift in longitudinal direction. IEICE Electron. Express 8 (17) (2011)
Shoichiro Matsuo, Katsuhiro Takenaga, Yoko Arakawa, Yusuke Sasaki, Shoji Tanigawa, Kunimasa Saitoh, Masanori Koshiba
Crosstalk behavior of cores in multi-core fiber under bent condition. IEICE Electron. Express 8 (6) (2011)
Kunimasa Saitoh, Yukihiro Tsuchida, Masanori Koshiba
Design of effectively single-mode leakage channel fibers with large mode area and low bending loss. IEICE Electron. Express 6 (7) (2009)
Masanori Koshiba, Kunimasa Saitoh, Yasuo Kokubun
Heterogeneous multi-core fibers: proposal and design principle. IEICE Electron. Express 6 (2) (2009)
Keiichi Morikawa, Takeshi Fujisawa, Kunimasa Saitoh, Masanori Koshiba
Transmission characteristics of laterally illuminated photonic crystal fibers. IEICE Electron. Express 3 (4) (2006)
Ikumi Enomori, Kunimasa Saitoh, Masanori Koshiba
Fundamental Characteristics of Localized Acoustic Modes in Photonic Crystal Fibers. IEICE Trans. Electron. (5) (2005)