1.4μm-1.6μm Wavelength Conversion Using Multiple Quasi-Phase Matching LiNbO3. - Saroeun Punhavan; Masato Kato; Keisuke Sugiyama; Masaki Asobe; Takeshi Umeki; Koji Enbutsu; Takushi Kazama; Takahiro Kashiwazaki; Ryoichi Kasahara (OECC/PSC, 2019)

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)

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)