Supervisory system for cascaded semiconductor laser amplifier repeaters
- 2 March 1989
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 25 (5) , 309-311
- https://doi.org/10.1049/el:19890215
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
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