Ryoichi KASAHARA

Channel Arrangement Design in Lumped Amplified WDM Transmission over NZ-DSF Link with Nonlinearity Mitigation Using Optical Phase Conjugation
Shimpei SHIMIZU Takayuki KOBAYASHI Takeshi UMEKI Takushi KAZAMA Koji ENBUTSU Ryoichi KASAHARA Yutaka MIYAMOTO 
Publication:   
Publication Date: 2022/07/01
Vol. E105-B  No. 7  pp. 805-813
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
optical signal processing techniques for optical communications, optical phase conjugation, nonlinear optics, periodically poled LiNbO3 waveguide, 
 Summary | Full Text:PDF
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 
Publication:   
Publication Date: 2020/11/01
Vol. E103-B  No. 11  pp. 1226-1232
Type of Manuscript:  Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
optical signal processing techniques for optical communications, optical phase conjugation, nonlinear optics, periodically poled LiNbO3 waveguide, 
 Summary | Full Text:PDF
PPLN-Based Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump
Takushi KAZAMA Takeshi UMEKI Yasuhiro OKAMURA Koji ENBUTSU Osamu TADANAGA Atsushi TAKADA Ryoichi KASAHARA 
Publication:   
Publication Date: 2020/11/01
Vol. E103-B  No. 11  pp. 1265-1271
Type of Manuscript:  Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
phase sensitive amplifier, periodically poled LiNbO3 waveguide, noise figure, 
 Summary | Full Text:PDF