Optical communication link fault signalling

Details Optical communication link fault signalling Optical communication link fault signalling

1992-12-03

1998-03-03

Bacares, Rafael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359177, 359179, H04B 1002

Patent

active

057241490

ABSTRACT:
A fault signalling system for an optical fiber-based communications link having erbium doped fiber amplifier repeaters comprises a broadband optical source for generating a fault signal in the event of a fault occurring. Each repeater includes such a broadband source, which will output a characteristic fault signal onto the link for transmission to a receiving station, in the event of a fault being detected at that repeater. Advantageously, a control circuit which enables the source to emit its fault signal when appropriate is also used as part of an automatic gain control for the output of the amplifier repeater in normal operation.

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Mahony, Developments in Optical Amplifier Technology and Systems, IEEE Apr. 1990.

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