Masashi USAMI


All-Optical Regeneration by Electro-Absorption Modulator
Kohsuke NISHIMURA Ryo INOHARA Masashi USAMI Shigeyuki AKIBA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/03/01
Vol. E88-C  No. 3  pp. 319-326
Type of Manuscript:  INVITED PAPER (Special Section on Optical Signal-Processing Devices for Photonic Networks)
Category: 
Keyword: 
all-optical wavelength conversionoptical 3R regenerationoptical 2R regenerationelectro-absorption modulator
 Summary | Full Text:PDF

40 Gbit/s Transmission with All-Optical 3R Regeneration Using Two-Stage SOA-Based Polarization Discriminated Switch with Assist Light Injection
Ryo INOHARA Kohsuke NISHIMURA Munefumi TSURUSAWA Masashi USAMI Shigeyuki AKIBA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/07/01
Vol. E87-C  No. 7  pp. 1106-1113
Type of Manuscript:  Special Section PAPER (Special Section on Ultrafast Photonics)
Category: 
Keyword: 
all-optical regenerationwavelength conversionsemiconductor optical amplifierall-optical signal processingoptical 3R
 Summary | Full Text:PDF

Highly Reliable and High Power 980 nm Pump Laser Diode Module for Undersea Cable Systems
Masashi USAMI Yuichi MATSUSHIMA Hideyoshi HORIE Hideaki KANEDA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/05/01
Vol. E84-B  No. 5  pp. 1265-1273
Type of Manuscript:  INVITED PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Optical Active Devices and Modules
Keyword: 
980-nm pump laserEDFAWDMundersea systemreliability
 Summary | Full Text:PDF

Highly Reliable and High Power 980 nm Pump Laser Diode Module for Undersea Cable Systems
Masashi USAMI Yuichi MATSUSHIMA Hideyoshi HORIE Hideaki KANEDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/05/01
Vol. E84-C  No. 5  pp. 639-647
Type of Manuscript:  INVITED PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Optical Active Devices and Modules
Keyword: 
980-nm pump laserEDFAWDMundersea systemreliability
 Summary | Full Text:PDF

Low Threshold /4-Shifted InGaAsP/InP DFB Lasers
Masashi USAMI Shigeyuki AKIBA Katsuyuki UTAKA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/04/25
Vol. E69-E  No. 4  pp. 385-388
Type of Manuscript:  Special Section LETTER (Special Issue: Papers from 1986 National Convention IECE Japan)
Category: Lasers and Related Devices
Keyword: 
 Summary | Full Text:PDF

TE/TM Ratio in InGaAsP/InP /4-Shifted DFB Lasers with Non-Reflective Ends
Shigeyuki AKIBA Masashi USAMI Katsuyuki UTAKA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/04/25
Vol. E69-E  No. 4  pp. 389-391
Type of Manuscript:  Special Section LETTER (Special Issue: Papers from 1986 National Convention IECE Japan)
Category: Lasers and Related Devices
Keyword: 
 Summary | Full Text:PDF