Hisashi IZUMITA


Optical Fiber Line Testing System Employing 1.65 µm Test Light Bypass Module for In-Service Monitoring of ADM Ring Networks
Yoshitaka ENOMOTO Hisashi IZUMITA Nobuo TOMITA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/08/01
Vol. E91-B  No. 8  pp. 2494-2500
Type of Manuscript:  Special Section PAPER (Special Section on Next Generation Broadband Access Technologies)
Category: 
Keyword: 
OTDRADMoptical testingoptical fibermaintenance
 Summary | Full Text:PDF

Newly Developed Optical Fiber Line Testing System Employing Bi-Directional OTDRs for PON and In-Service Line Testing Criteria
Yusuke KOSHIKIYA Noriyuki ARAKI Hisashi IZUMITA Fumihiko ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Vol. E90-B  No. 10  pp. 2793-2802
Type of Manuscript:  PAPER
Category: Optical Fiber for Communications
Keyword: 
maintenanceoptical fiber testingoptical time domain reflectometerfault location
 Summary | Full Text:PDF

Extended Optical Fiber Line Testing System with L/U-Band Optical Coupler Employing 4-Port Circulators and Chirped Fiber Bragg Grating Filters for L-Band WDM Transmission
Nazuki HONDA Noriyuki ARAKI Hisashi IZUMITA Minoru NAKAMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/05/01
Vol. E86-B  No. 5  pp. 1562-1566
Type of Manuscript:  Special Section PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: 
Keyword: 
optical fiber line testing systemL-bandOTDRoptical couplercirculator
 Summary | Full Text:PDF

Reduction in Optical Fiber Maintenance Cost by Using Automatic Optical Fiber Operations Support System with Remote Fiber Selector
Noriyuki ARAKI Hisashi IZUMITA Minoru NAKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/04/01
Vol. E85-C  No. 4  pp. 915-920
Type of Manuscript:  Special Section PAPER (Special Issue on Optical Fibers and Devices)
Category: 
Keyword: 
optical access networksmaintenanceoptical fiber testingoperating systemsOTDR
 Summary | Full Text:PDF

Brillouin Optical-Fiber Time Domain Reflectometry
Toshio KURASHIMA Tsuneo HORIGUCHI Hisashi IZUMITA Shin-ichi FURUKAWA Yahei KOYAMADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/04/25
Vol. E76-B  No. 4  pp. 382-390
Type of Manuscript:  Special Section PAPER (Special Issue on Optical Fiber Cables and Related Technologies)
Category: 
Keyword: 
Brillouin scatteringoptical fiberstraincoherent detectiontemerature
 Summary | Full Text:PDF