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ORCIDTakeshi Fujisawa
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Journal Articles
- 2023
[j8]Han Wang, Takeshi Fujisawa, Takanori Sato, Masaki Wada, Takayoshi Mori, Taiji Sakamoto, Ryota Imada, Takashi Matsui, Kazuhide Nakajima, Kunimasa Saitoh:
Design of PLC E31-E13 and E-LP tapered mode converters using fast quasiadiabatic dynamics. IEICE Electron. Express 20(23): 20230392 (2023)- 2021
- [j7]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): 20210110 (2021) - 2019
- [j6]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): 20181126 (2019) - 2018
- [j5]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. 101-C(7): 518-526 (2018) - 2017
- [j4]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): 20160989 (2017) - 2011
- [j3]Takeshi Fujisawa, Tsutomu Kitoh, Kei Watanabe, Kenya Suzuki, Masaki Kotoku, Hiroshi Takahashi:
Wide-bandwidth, low-waveguide-width-sensitivity InP-based multimode interference coupler designed by wavefront matching method. IEICE Electron. Express 8(24): 2100-2105 (2011) - [j2]Takeshi Fujisawa, Kiyoto Takahata, Takashi Tadokoro, Wataru Kobayashi, Akira Ohki, Naoki Fujiwara, Shigeru Kanazawa, Takayuki Yamanaka, Fumiyoshi Kano:
Long-Reach 100 Gbit Ethernet Light Source Based on 4×25-Gbit/s 1.3-µm InGaAlAs EADFB Lasers. IEICE Trans. Electron. 94-C(7): 1167-1172 (2011) - 2006
- [j1]Keiichi Morikawa, Takeshi Fujisawa, Kunimasa Saitoh, Masanori Koshiba:
Transmission characteristics of laterally illuminated photonic crystal fibers. IEICE Electron. Express 3(4): 70-73 (2006)
Conference and Workshop Papers
- 2023
- [c32]Tadakazu Sakakura, Takeshi Fujisawa:
Prototype of Visualization System for Discussion in Project-Based Learning Toward Education DX. ICEED 2023: 37-40 - [c31]Takeshi Fujisawa, Kunimasa Saitoh:
Fabrication-tolerant, 2-mode, 4λ multiplexer based on Si waveguides for beyond Tbit/s optical Ethernet. OFC 2023: 1-3 - [c30]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: 1-3 - 2022
- [c29]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: 1-3 - [c28]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: 1-3 - [c27]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: 1-3 - 2021
- [c26]Yusuke Sawada, Takeshi Fujisawa, Takanori Sato, Kunimasa Saitoh:
Experimental Demonstration of Broadband Silicon 4-Mode (de)Multiplexer Designed by Wavefront-Matching Method. OFC 2021: 1-3 - 2020
- [c25]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: 1-4 - [c24]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: 1-3 - [c23]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: 1-3 - [c22]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: 1-3 - 2019
- [c21]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: 1-3 - [c20]Yusuke Sawada, Takeshi Fujisawa, Takanori Sato, Kunimasa Saitoh:
First Experimental Demonstration of Wavefront-Matching-Method-Designed Silicon Mode Converters. OFC 2019: 1-3 - [c19]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: 1-3 - [c18]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: 1-3 - [c17]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: 1-3 - [c16]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: 1-3 - [c15]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: 1-3 - 2018
- [c14]Tadakazu Sakakura, Norihisa Matsumoto, Akiko Nakatani, Takeshi Fujisawa:
Digital teaching materials of Kosen fundamental mathematics for Bilingual Engineering Education. ICEED 2018: 154-158 - 2017
- [c13]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: 1-3 - [c12]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: 1-3 - [c11]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: 1-3 - [c10]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: 1-3 - [c9]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: 1-3 - 2016
- [c8]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: 1-3 - [c7]Shigeru Kanazawa, Takeshi Fujisawa, Kiyoto Takahata, Yasuhiko Nakanishi, Hiroshi Yamazaki, Yuta Ueda, Wataru Kobayashi, Yoshifumi Muramoto, Hiroyuki Ishii, Hiroaki Sanjoh:
56-Gbaud 4-PAM (112-Gbit/s) operation of flip-chip interconnection lumped-electrode EADFB laser module for equalizer-free transmission. OFC 2016: 1-3 - [c6]Shigeru Kanazawa, Hiroshi Yamazaki, Yasuhiko Nakanishi, Takeshi Fujisawa, Kiyoto Takahata, Yuta Ueda, Wataru Kobayashi, Yoshifumi Muramoto, Hiroyuki Ishii, Hiroaki Sanjoh:
Transmission of 214-Gbit/s 4-PAM signal using an ultra-broadband lumped-electrode EADFB laser module. OFC 2016: 1-3 - 2015
- [c5]Takeshi Fujisawa, Kunimasa Saitoh:
A principal mode analysis of strongly-coupled 3-core fibres. ECOC 2015: 1-3 - [c4]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: 1-3 - [c3]Shigeru Kanazawa, Takeshi Fujisawa, Kiyoto Takahata, Hiroaki Sanjoh, Ryuzo Iga, Yuta Ueda, Wataru Kobayashi, Hiroyuki Ishii:
400-Gb/s operation of flip-chip interconnection EADFB laser array module. OFC 2015: 1-3 - 2014
- [c2]Wataru Kobayashi, M. Arai, Takeshi Fujisawa, Y. Shibata, Tomonari Sato, Toshio Ito, Koichi Hasebe, Takayuki Yamanaka, Hiroaki Sanjoh:
40-Gbit/s EADFB laser integrated with short cavity SOA improving chirp characteristics with low power consumption. ECOC 2014: 1-3 - 2003
- [c1]Norman D. Cook, Takeshi Fujisawa, Kazuaki Takami:
Evaluation of the affect of speech intonation using a model of the perception of interval dissonance and harmonic tension. INTERSPEECH 2003: 105-108
Coauthor Index
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