Shoichiro KUWAHARA


Dual-Carrier 1-Tb/s Transmission Over Field-Deployed G.654.E Fiber Link Using Real-Time Transponder
Fukutaro HAMAOKA Takeo SASAI Kohei SAITO Takayuki KOBAYASHI Asuka MATSUSHITA Masanori NAKAMURA Hiroki TANIGUCHI Shoichiro KUWAHARA Hiroki KAWAHARA Takeshi SEKI Josuke OZAKI Yoshihiro OGISO Hideki MAEDA Yoshiaki KISAKA Masahito TOMIZAWA 
Publication:   
Publication Date: 2020/11/01
Vol. E103-B  No. 11  pp. 1183-1189
Type of Manuscript:  INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
optical fiber communicationdigital coherent transmissionreal-time transmissionfield transmission
 Summary | Full Text:PDF

Proposal and Verification of Auto Calibration Technique for Bias Control Circuit Connecting to Built-In Optical Power Monitor in Imperfect IQ-Modulator
Hiroto KAWAKAMI Shoichiro KUWAHARA Yoshiaki KISAKA 
Publication:   
Publication Date: 2020/11/01
Vol. E103-B  No. 11  pp. 1299-1304
Type of Manuscript:  Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
optical transmitterIQ-modulatoroptical QAMauto bias controlcalibration
 Summary | Full Text:PDF

Carrier-Suppressed Return-to-Zero Pulse Generation Using Mode-Locked Lasers for 40-Gbit/s Transmission
Kenji SATO Shoichiro KUWAHARA Yutaka MIYAMOTO Koichi MURATA Hiroshi MIYAZAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/02/01
Vol. E85-B  No. 2  pp. 410-415
Type of Manuscript:  Special Section PAPER (Special Issue on 40 Gbit/s Optical Transmission Technologies)
Category: 
Keyword: 
semiconductor mode-locked laserphase inversionchirped gratinghigh-speed transmission
 Summary | Full Text:PDF

Design Consideration on 43 Gbit/s OTN Line Terminal
Takashi ONO Masahito TOMIZAWA Tomoyoshi KATAOKA Akihiko MATSUURA Yoshiaki KISAKA Yutaka MIYAMOTO Kazushige YONENAGA Shoichiro KUWAHARA Yasuhiko TADA Hiromu TOBA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/02/01
Vol. E85-B  No. 2  pp. 423-430
Type of Manuscript:  Special Section PAPER (Special Issue on 40 Gbit/s Optical Transmission Technologies)
Category: 
Keyword: 
OTNmultiple clientsFECGbEperformance monitor
 Summary | Full Text:PDF

1 Tbit/s (25 43 Gbit/s) Field Trial Using 43-Gbit/s/ch OTN Interface Prototype
Shoichiro KUWAHARA Kazushige YONENAGA Yutaka MIYAMOTO Yoshiaki KISAKA Kenji SATO Akira HIRANO Takashi ONO Akihiko MATSUURA Masahito TOMIZAWA Tomoyoshi KATAOKA Yasuhiko TADA Hiromu TOBA Kazuo HAGIMOTO Nobuhiro HIRAYAMA Hirotaka ASAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/02/01
Vol. E85-B  No. 2  pp. 470-477
Type of Manuscript:  Special Section PAPER (Special Issue on 40 Gbit/s Optical Transmission Technologies)
Category: 
Keyword: 
OTNmultiple clientsFECInP HEMTUTC-PD
 Summary | Full Text:PDF