Optical device, system and method for detecting a condition in an optical device
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United States of America Patent
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Mar 30, 2004
Grant Date -
Mar 20, 2003
app pub date -
Sep 17, 2001
filing date -
Sep 17, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optical device and system and method for monitoring a fault condition in an optical device. A loop-back path couples a portion of an optical signal from a first transmission path to a second transmission path as a loop-back signal. The loop-back path includes at least one optical attenuator configured to attenuate the loop-back signal in response to at least one detected condition. The loop-back signal may be detected by line monitoring equipment, where the attenuation imparted by the attenuator is interpreted as corresponding to the detected condition.
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