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Takeshi Umeki
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2020 – today
- 2024
- [c32]Takayuki Kobayashi, Shimpei Shimizu, Akira Kawai, Masanori Nakamura, Masashi Abe, Takushi Kazama, Takeshi Umeki, Munehiko Nagatani, Kosuke Kimura, Hitoshi Wakita, Yuta Shiratori, Fukutaro Hamaoka, Hiroshi Yamazaki, Hiroyuki Takahashi, Yutaka Miyamoto:
C+L+U-Band 14.85-THz WDM Transmission Over 80-km-Span G.654.E Fiber with Hybrid PPLN-OPA/EDFA U-Band Lumped Repeater Using 144-Gbaud PCS-QAM Signals. OFC 2024: 1-3 - [c31]Haruka Minami, Takafumi Fukatani, Masahiro Nakagawa, Takeshi Seki, Shimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Koji Enbutsu, Takeshi Umeki, Rie Hayashi, Takeshi Kuwahara:
Cascadability of PPLN-Based Inter-Band Wavelength Conversion for Band-Switchable Multi-Band Optical Cross-Connect. OFC 2024: 1-3 - [c30]Hidenobu Muranaka, Tomoyuki Kato, Tomohiro Yamauchi, Hiroyuki Irie, Hiroki Ooi, Yu Tanaka, Shimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Masashi Abe, Takeshi Umeki, Yutaka Miyamoto, Takeshi Hoshida:
Modeling and Experimental Verification in S+C+L+U Quadrable-Band WDM Transmission System using C+L-Band Transceivers and Wavelength Converters. OFC 2024: 1-3 - [c29]Masashi Ota, Kenya Suzuki, Keita Yamaguchi, Takeshi Umeki, Satomi Katayose, Osamu Moriwaki:
Highly rectangular SCL-band MUX/DEMUX filter using compact cascaded arrayed waveguide gratings. OFC 2024: 1-3 - [c28]Shimpei Shimizu, Takushi Kazama, Takeshi Umeki, Koji Enbutsu, Masanori Nakamura, Masashi Abe, Takayuki Kobayashi, Yutaka Miyamoto:
PPLN-Based Polarization-Diverse Phase-Sensitive Amplification of 96-Gbaud PDM-PCS-64QAM Signal with Carrier-Phase-Locked Phase-Conjugated Twin Waves. OFC 2024: 1-3 - [c27]Kenya Suzuki, Masashi Ota, Yoshie Morimoto, Keita Yamaguchi, Fukutaro Hamaoka, Shuto Sugawara, Takeo Sasai, Takayuki Kobayashi, Masanori Nakamura, Satomi Katayose, Takeshi Umeki, Daisuke Ogawa, Yiran Ma, Stefano Camatel, Mitsunori Fukutoku, Yutaka Miyamoto, Osamu Moriwaki:
Double-decker CDC-ROADM node for multi-band network with wavelength band granularity. OFC 2024: 1-3 - 2023
- [j6]Tomoyuki Kato, Hidenobu Muranaka, Yu Tanaka, Yuichi Akiyama, Takeshi Hoshida, Shimpei Shimizu
, Takayuki Kobayashi
S-Band WDM Transmission Using PPLN-Based Wavelength Converters and 400-Gb/s C-Band Real-Time Transceivers. IEICE Trans. Commun. 106(11): 1093-1101 (2023) - [c26]Takayuki Kobayashi, Shimpei Shimizu, Masanori Nakamura, Takushi Kazama, Masashi Abe, Takeshi Umeki, Akira Kawai, Fukutaro Hamaoka, Munehiko Nagatani, Hiroshi Yamazaki, Yutaka Miyamoto:
103-ch. 132-Gbaud PS-QAM Signal Inline-amplified Transmission with 14.1-THz Bandwidth Lumped PPLN-based OPAs over 400-km G.652.D SMF. OFC 2023: 1-3 - [c25]Haruka Minami, Kenta Hirose, Takafumi Fukatani, Masahiro Nakagawa, Takeshi Seki, Shimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Koji Enbutsu, Kei Watanabe, Takeshi Umeki, Takashi Miyamura, Takeshi Kuwahara:
Experimental Demonstration of Cascadable PPLN-Based Inter-Band Wavelength Converters for Band-Switchable Multi-Band Optical Cross-Connect. OFC 2023: 1-3 - [c24]Shimpei Shimizu, Takayuki Kobayashi, Akira Kawai, Takushi Kazama, Masanori Nakamura, Koji Enbutsu, Takahiro Kashiwazaki, Masashi Abe, Takeshi Umeki, Yutaka Miyamoto, Tomoyuki Kato, Yu Tanaka, Takeshi Hoshida:
38.4-Tbps Inline-amplified Transmission Using PPLN-based Optical Parametric Amplifier over 6 THz within L- and U-bands. OFC 2023: 1-3 - 2022
- [j5]Shimpei Shimizu
Channel Arrangement Design in Lumped Amplified WDM Transmission over NZ-DSF Link with Nonlinearity Mitigation Using Optical Phase Conjugation. IEICE Trans. Commun. 105-B(7): 805-813 (2022) - [c23]Takayuki Kobayashi, Shimpei Shimizu, Masanori Nakamura, Takeshi Umeki, Takushi Kazama, Junji Yoshida, Shigehiro Takasaka, Yasuto Tatamida, Hiroto Kawakami, Fukutaro Hamaoka, Munehiko Nagatani, Hiroshi Yamazaki, Kei Watanabe, Takashi Saida, Yutaka Miyamoto:
50-Tb/s (1 Tb/s × 50 ch) WDM Transmission on Two 6.25-THz Bands Using Hybrid Inline Repeater of PPLN-based OPAs and Incoherent-forward-pumped DRA. OFC 2022: 1-3 - [c22]Megumi Hoshi, Kohki Shibahara, Shimpei Shimizu
Mitigation of Intercore Crosstalk Impact with PPLN-based Optical Spectrum Inversion. OECC/PSC 2022: 1-4 - [c21]Tomoyuki Kato, Hidenobu Muranaka, Yu Tanaka, Yuichi Akiyama, Takeshi Hoshida, Shimpei Shimizu
WDM Transmission in S-Band Using PPLN-Based Wavelength Converters and 400-Gb/s C-Band Real-Time Transceivers. OECC/PSC 2022: 1-4 - [c20]Shimpei Shimizu
Generation of Carrier-Synchronized PDM Signal-Idler Pair for Polarization-Independent Phase-Sensitive Amplification. OECC/PSC 2022: 1-4 - 2021
- [c19]Takayuki Kobayashi
13.4-Tb/s WDM Transmission over 1, 280 km Repeated only with PPLN-based Optical Parametric Inline Amplifier. ECOC 2021: 1-4 - [c18]Shimpei Shimizu
8-Tbps (20 × 400 Gbps) Unrepeated Transmission over 80 km with 2-THz PPLN-Based Phase-Sensitive Amplification Using Precise Chromatic Dispersion Pre-Compensation. ECOC 2021: 1-4 - [c17]Yutaka Miyamoto, Takayuki Kobayashi, Takeshi Umeki, Takushi Kazama, Koji Enbutsu, Shimpei Shimizu, Ryoichi Kasahara:
Wideband PPLN-based optical parametric amplifiers for scalable optical transport network. OFC 2021: 1-3 - 2020
- [j4]Takeshi Umeki, Takayuki Kobayashi
Nonlinearity Mitigation of PDM-16QAM Signals Using Multiple CSI-OPCs in Ultra-Long-Haul Transmission without Excess Penalty. IEICE Trans. Commun. 103-B(11): 1226-1232 (2020) - [j3]Takushi Kazama, Takeshi Umeki, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Atsushi Takada, Ryoichi Kasahara:
PPLN-Based Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump. IEICE Trans. Commun. 103-B(11): 1265-1271 (2020) - [c16]Takayuki Kobayashi, Shimpei Shimizu, Masahito Nakamura, Takeshi Umeki, Takushi Kazama, Ryoichi Kasahara, Fukutaro Hamaoka, Munehiko Nagatani, Hiroshi Yamazaki, Takayuki Mizuno, Hideyuki Nosaka, Yutaka Miyamoto:
Wideband Inline-Amplified WDM Transmission using PPLN-Based OPA with Over-10-THz Bandwidth. OFC 2020: 1-3 - [c15]Shimpei Shimizu, Takushi Kazama, Takayuki Kobayashi, Takeshi Umeki, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto:
Gain Ripple and Passband Narrowing Due to Residual Chromatic Dispersion in Non-Degenerate Phase-Sensitive Amplifiers. OFC 2020: 1-3 - [i2]Takahiro Inagaki, Kensuke Inaba, Timothée G. Leleu, Toshimori Honjo, Takuya Ikuta, Koji Enbutsu, Takeshi Umeki, Ryoichi Kasahara, Kazuyuki Aihara, Hiroki Takesue:
Collective and synchronous dynamics of photonic spiking neurons. CoRR abs/2009.11454 (2020)
2010 – 2019
- 2019
- [c14]Takayuki Kobayashi, Masanori Nakamura, Fukutaro Hamaoka, Munehiko Nagatani, Hitoshi Wakita, Hiroshi Yamazaki, Takeshi Umeki, Hideyuki Nosaka, Yutaka Miyamoto:
35-Tb/s C-Band Transmission Over 800 km Employing 1-Tb/s PS-64QAM Signals Enhanced by Complex 8 × 2 MIMO Equalizer. OFC 2019: 1-3 - [c13]Takushi Kazama, Takeshi Umeki, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Atsushi Takada, Ryoichi Kasahara:
Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump. OECC/PSC 2019: 1-3 - [c12]Saroeun Punhavan, Masato Kato, Keisuke Sugiyama, Masaki Asobe, Takeshi Umeki, Koji Enbutsu, Takushi Kazama, Takahiro Kashiwazaki, Ryoichi Kasahara:
1.4μm-1.6μm Wavelength Conversion Using Multiple Quasi-Phase Matching LiNbO3. OECC/PSC 2019: 1-3 - [c11]Takeshi Umeki, Takayuki Kobayashi
Nonlinearity mitigation of PDM-16QAM signal using multiple CSI-OPCs in ultra-long haul transmission without excess penalty. OECC/PSC 2019: 1-3 - 2018
- [j2]Masaki Asobe, Takeshi Umeki, Osamu Tadanaga:
Phase Sensitive Amplifier Using Periodically Poled LiNbO3 Waveguides and Their Applications. IEICE Trans. Electron. 101-C(7): 586-593 (2018) - [c10]Takayuki Kobayashi, Takeshi Umeki, Ryoichi Kasahara, Hiroshi Yamazaki, Munehiko Nagatani, Hitoshi Wakita, Hirokazu Takenouchi, Yutaka Miyamoto:
96-Gbaud PDM-8QAM Single Channel Transmission over 9, 600 km by Nonlinear Tolerance Enhancement using PPLN-based Optical Phase Conjugation. OFC 2018: 1-3 - [c9]Takeshi Umeki, Takushi Kazama, Takayuki Kobayashi, Koji Enbutsu, Osamu Tadanaga, Hirokazu Takenouchi, Ryoichi Kasahara, Yutaka Miyamoto:
Towards Practical Implementation of Optical Parametric Amplifiers Based on PPLN Waveguides. OFC 2018: 1-3 - [c8]Takeshi Umeki, Takushi Kazama, Takayuki Kobayashi, Shigehiro Takasaka, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Hirokazu Takenouchi, Ryuichi Sugizaki, Atsushi Takada, Ryoichi Kasahara, Yutaka Miyamoto:
Polarization-diversity In-line Phase Sensitive Amplifier for Simultaneous Amplification of Fiber-transmitted WDM PDM-16QAM Signals. OFC 2018: 1-3 - [i1]Ryan Hamerly, Takahiro Inagaki, Peter L. McMahon, Davide Venturelli, Alireza Marandi, Tatsuhiro Onodera, Edwin Ng, Carsten Langrock, Kensuke Inaba, Toshimori Honjo, Koji Enbutsu, Takeshi Umeki, Ryoichi Kasahara, Shoko Utsunomiya, Satoshi Kako, Ken-ichi Kawarabayashi, Robert L. Byer, Martin M. Fejer, Hideo Mabuchi, Eleanor Gilbert Rieffel, Hiroki Takesue, Yoshihisa Yamamoto:
Scaling advantages of all-to-all connectivity in physical annealers: the Coherent Ising Machine vs. D-Wave 2000Q. CoRR abs/1805.05217 (2018) - 2016
- [j1]Koji Enbutsu, Takeshi Umeki, Osamu Tadanaga, Masaki Asobe, Hirokazu Takenouchi:
PPLN-Based Low-Noise In-Line Phase Sensitive Amplifier with Highly Sensitive Carrier-Recovery System. IEICE Trans. Commun. 99-B(8): 1727-1733 (2016) - [c7]Takushi Kazama, Takeshi Umeki, Masashi Abe, Koji Enbutsu, Yutaka Miyamoto, Hirokazu Takenouchi:
Low-noise phase-sensitive amplifier for guard-band-less 16-channel DWDM signal using PPLN waveguides. OFC 2016: 1-3 - 2015
- [c6]Koji Enbutsu, Takeshi Umeki, Osamu Tadanaga, Hirokazu Takenouchi, Masaki Asobe:
PPLN-based low-noise in-line phase sensitive amplifier with highly sensitive carrier-recovery system. APCC 2015: 666-669 - [c5]Takeshi Umeki, Takushi Kazama, H. Ono, Yutaka Miyamoto, Hirokazu Takenouchi:
Spectrally efficient optical phase conjugation based on complementary spectral inversion for nonlinearity mitigation. ECOC 2015: 1-3 - 2014
- [c4]Takeshi Umeki, Takushi Kazama, Osamu Tadanaga, Koji Enbutsu, Masaki Asobe, Yutaka Miyamoto, Hirokazu Takenouchi:
First demonstration of PDM signal amplification using PPLN-based polarization-independent phase sensitive amplifier. ECOC 2014: 1-3 - [c3]Takeshi Umeki, Masaki Asobe, H. Takara, Osamu Tadanaga, Koji Enbutsu, Yutaka Miyamoto, Hirokazu Takenouchi:
Low noise and regenerative phase sensitive amplifier based on PPLN waveguides. OFC 2014: 1-3 - 2013
- [c2]Masaki Asobe, Takeshi Umeki, Hirokazu Takenouchi:
PPLN based phase sensitive amplifiers and their applications. OFC/NFOEC 2013: 1-3 - [c1]Takeshi Umeki, Masaki Asobe, H. Takara, Takayuki Kobayashi, Hirokazu Kubota, Hirokazu Takenouchi, Yutaka Miyamoto:
First demonstration of multi-span transmission using phase and amplitude regeneration in PPLN-based PSA. OFC/NFOEC 2013: 1-3
Coauthor Index
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