1.5µm Range Optical Time Domain Reflectometry Utilizing an LD and a Cooled InGaAs/InP APD

Kenji SHIMIZU  Masayuki FUJISE  

Publication
IEICE TRANSACTIONS (1976-1990)   Vol.E70   No.4   pp.294-296
Publication Date: 1987/04/25
Online ISSN: 
DOI: 
Print ISSN: 0000-0000
Type of Manuscript: Special Section LETTER (Special Issue: Papers from 1987 National Convention IEICE)
Category: Optoelectronics
Keyword: 


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Summary: 
A Rayleigh backscattered signal over a 64 km single-mode fiber has been successfully observed by a long-range OTDR utilizing a 1.5µm LD and an InGaAs/InP APD cooled to 0 with a Peltier's thermodevice, which improves 9.0 dB in the detector sensitivity in comparison with a Ge-APD at room temperature.