Masahito TOMIZAWA


400Gbit/s/ch Field Demonstration of Modulation Format Adaptation Based on Pilot-Aided OSNR Estimation Using Real-Time DSP
Seiji OKAMOTO Kazushige YONENAGA Kengo HORIKOSHI Mitsuteru YOSHIDA Yutaka MIYAMOTO Masahito TOMIZAWA Takeshi OKAMOTO Hidemi NOGUCHI Jun-ichi ABE Junichiro MATSUI Hisao NAKASHIMA Yuichi AKIYAMA Takeshi HOSHIDA Hiroshi ONAKA Kenya SUGIHARA Soichiro KAMETANI Kazuo KUBO Takashi SUGIHARA 
Publication:   
Publication Date: 2017/10/01
Vol. E100-B  No. 10  pp. 1726-1733
Type of Manuscript:  INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
adaptive modulationfield trialreal-time DSP400Gbit/s
 Summary | Full Text:PDF(4.3MB)

High-Performance Distributed Raman Amplification Systems with Limited Pump Power
Hiroji MASUDA Masahito TOMIZAWA Yutaka MIYAMOTO Kazuo HAGIMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/03/01
Vol. E89-B  No. 3  pp. 715-723
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
Raman amplificationoptical communication system
 Summary | Full Text:PDF(1.3MB)

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(1.1MB)

N 40-Gbit/s DWDM Transport System Using Novel Return-to-Zero Formats with Modulation Bandwidth Reduction
Yutaka MIYAMOTO Kazushige YONENAGA Akira HIRANO Masahito TOMIZAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/02/01
Vol. E85-B  No. 2  pp. 374-385
Type of Manuscript:  INVITED PAPER (Special Issue on 40 Gbit/s Optical Transmission Technologies)
Category: 
Keyword: 
modulation format40 Gbit/sduobinaryCS-RZDCS-RZ
 Summary | Full Text:PDF(1.1MB)

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(1MB)

Statistical Design of Polarization Mode Dispersion on High-Speed Transmission Systems with Forward Error Correction
Masahito TOMIZAWA Yoshiaki KISAKA Takashi ONO Yutaka MIYAMOTO Yasuhiko TADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/02/01
Vol. E85-B  No. 2  pp. 454-462
Type of Manuscript:  Special Section PAPER (Special Issue on 40 Gbit/s Optical Transmission Technologies)
Category: 
Keyword: 
PMDDGDFECstatistical design
 Summary | Full Text:PDF(660.6KB)

Extracted-Clock Power Level Monitoring Scheme for Automatic Dispersion Equalization in High-Speed Optical Transmission Systems
Akihide SANO Yutaka MIYAMOTO Tomoyoshi KATAOKA Masahito TOMIZAWA Kazuo HAGIMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/11/01
Vol. E84-B  No. 11  pp. 2907-2914
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission
Keyword: 
optical communicationdispersion equalizationautomatic equalizationself-phase modulation
 Summary | Full Text:PDF(825.7KB)

Reduced Matrix Representation of Self-Healing Networks
Masahito TOMIZAWA Yoshiaki YAMABAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/06/25
Vol. E81-B  No. 6  pp. 1152-1161
Type of Manuscript:  PAPER
Category: Communication Networks and Services
Keyword: 
survivabilityself-healingringDCS
 Summary | Full Text:PDF(759.5KB)

Distributed-Controlled Multiple-Ring Networks with Classified Path Restoration
Masahito TOMIZAWA Shinji MATSUOKA Yoshihiko UEMATSU 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/07/25
Vol. E80-B  No. 7  pp. 1000-1007
Type of Manuscript:  PAPER
Category: Communication Networks and Services
Keyword: 
multiple-ringclassified path restorationdistributed-controlSDH
 Summary | Full Text:PDF(658.3KB)

An Architecture for Optical Ring Trunk-Transmission Networks
Masahito TOMIZAWA Yoshiaki YAMABAYASHI Nobuyuki KAWASE Yukio KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/08/25
Vol. E79-B  No. 8  pp. 1121-1128
Type of Manuscript:  PAPER
Category: Optical Communication
Keyword: 
optical ring trunk-transmission networksADMtimeslot (wavelength) sortingself-healing algorithm
 Summary | Full Text:PDF(799.9KB)