Method and system for improved eye protection safety of high output power lumped optical amplifiers
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United States of America Patent
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Oct 21, 2008
Grant Date -
Aug 2, 2007
app pub date -
Mar 29, 2007
filing date -
Dec 2, 2004
priority date (Note) -
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Abstract
A system and method for providing eye-safety protection during operation of a lumped optical amplifier. The method is based on monitoring of continuous out-of-band Raman amplified spontaneous scattering (ASS) created by the amplified signal in an optical communication network span coupled to an output port of the lumped optical amplifier. The system includes at least one gain stage for providing an amplified signal introduced into the span, a monitoring unit for performing the continuous Raman ASS monitoring, and a control unit operative to detect and analyze in real-time changes in the ASS power, and upon determination that such changes indicate an open span, to reduce the power of the amplified signal or shut down the gain stage.
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