Title :
Supervisory system for cascaded semiconductor laser amplifier repeaters
Author :
Ellis, A.D. ; Stallard, W.A. ; Malyon, D.J.
Author_Institution :
British Telecom Res. Labs., Ipswich, UK
fDate :
3/2/1989 12:00:00 AM
Abstract :
A technique for locating a transmission path failure in an inline cascade of semiconductor laser amplifier repeaters to within one fibre span is demonstrated. If a fault occurs, the loss of signal is detected in the following repeaters and a locally generated tone modulates the spontaneous emission of the repeater, signalling the fault to the system terminals.
Keywords :
optical links; repeaters; semiconductor junction lasers; cascaded semiconductor laser amplifier repeaters; fibre span; inline cascade; locally generated tone; spontaneous emission; transmission path failure;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19890215
