Low-noise phase-sensitive amplifier for guard-band-less 16-channel DWDM signal using PPLN waveguides. - Takushi Kazama; Takeshi Umeki; Masashi Abe; Koji Enbutsu; Yutaka Miyamoto; Hirokazu Takenouchi (OFC, 2016)

Nonlinearity mitigation of PDM-16QAM signal using multiple CSI-OPCs in ultra-long haul transmission without excess penalty. - Takeshi Umeki; Takayuki Kobayashi; Akihide Sano; Takuya Ikuta; Masashi Abe; Takushi Kazama; Koji Enbutsu; Ryoichi Kasahara; Yutaka Miyamoto (OECC/PSC, 2019)

Nonlinearity Mitigation of PDM-16QAM Signals Using Multiple CSI-OPCs in Ultra-Long-Haul Transmission without Excess Penalty. - Takeshi Umeki; Takayuki Kobayashi; Akihide Sano; Takuya Ikuta; Masashi Abe; Takushi Kazama; Koji Enbutsu; Ryoichi Kasahara; Yutaka Miyamoto (IEICE Trans. Commun., 2020)

Hype Dlive: XR Live Performance System for Improving Passenger Comfort in Autonomous Driving. - Takuto Akiyoshi; Masashi Abe; Yuki Shimizu; Yusaku Takahama; Koki Nagata; Yosuke Okami; Taishi Sawabe (HAI, 2022)

Hype Live: Biometric-based Sensory Feedback for Improving the Sense of Unity in VR Live Performance. - Masashi Abe; Takuto Akiyoshi; Isidro Butaslac; Hangyu Zhou; Taishi Sawabe (VR Workshops, 2022)

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. - Takayuki Kobayashi; Shimpei Shimizu; Masanori Nakamura; Takushi Kazama; Masashi Abe; Takeshi Umeki; Akira Kawai; Fukutaro Hamaoka; Munehiko Nagatani; Hiroshi Yamazaki; Yutaka Miyamoto (OFC, 2023)

38.4-Tbps Inline-amplified Transmission Using PPLN-based Optical Parametric Amplifier over 6 THz within L- and U-bands. - Shimpei Shimizu; Takayuki Kobayashi; Akira Kawai; Takushi Kazama; Masanori Nakamura; Koji Enbutsu; Takahiro Kashiwazaki; Masashi Abe; Takeshi Umeki; Yutaka Miyamoto; Tomoyuki Kato; Yu Tanaka; et al. (OFC, 2023)

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. - Takayuki Kobayashi; Shimpei Shimizu; Akira Kawai; Masanori Nakamura; Masashi Abe; Takushi Kazama; Takeshi Umeki; Munehiko Nagatani; Kosuke Kimura; Hitoshi Wakita; Yuta Shiratori; Fukutaro Hamaoka; et al. (OFC, 2024)

Modeling and Experimental Verification in S+C+L+U Quadrable-Band WDM Transmission System using C+L-Band Transceivers and Wavelength Converters. - Hidenobu Muranaka; Tomoyuki Kato; Tomohiro Yamauchi; Hiroyuki Irie; Hiroki Ooi; Yu Tanaka; Shimpei Shimizu; Takayuki Kobayashi; Takushi Kazama; Masashi Abe; Takeshi Umeki; Yutaka Miyamoto; et al. (OFC, 2024)

PPLN-Based Polarization-Diverse Phase-Sensitive Amplification of 96-Gbaud PDM-PCS-64QAM Signal with Carrier-Phase-Locked Phase-Conjugated Twin Waves. - Shimpei Shimizu; Takushi Kazama; Takeshi Umeki; Koji Enbutsu; Masanori Nakamura; Masashi Abe; Takayuki Kobayashi; Yutaka Miyamoto (OFC, 2024)

9-THz Wideband PPLN-Based Wavelength Converter for Simultaneous Conversion of C+L-Band WDM Signal to Full S-Band. - Shunya Konno; Shimpei Shimizu; Masashi Abe; Takushi Kazama; Koji Enbutsu; Takahiro Kashiwazaki; Masanori Nakamura; Takayuki Kobayashi; Yutaka Miyamoto; Takeshi Umeki (OFC, 2025)

27-THz ISRS-Supported Transmission Over 1040 km in S+C+L+U and Extreme Longer-Wavelength Band. - Shimpei Shimizu; Kosuke Kimura; Akira Kawai; Masashi Abe; Shunya Konno; Takushi Kazama; Masanori Nakamura; Fukutaro Hamaoka; Koji Enbutsu; Takahiro Kashiwazaki; Munehiko Nagatani; Hitoshi Wakita; et al. (OFC, 2025)