Method and system for improved eye protection safety of distributed raman amplifiers
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United States of America Patent
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Oct 16, 2007
Grant Date -
Dec 7, 2006
app pub date -
Aug 13, 2006
filing date -
Dec 2, 2004
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Abstract
A system and method for providing eye-safety protection during operation of distributed Raman amplifiers based on the application of continuous out-of-band amplified spontaneous scattering (ASS) monitoring in an optical communication network span coupled to the Raman amplifier, and real-time detection and analysis of changes in the monitored ASS power level, The system includes at least one Raman pump for introducing Raman energy into the span, a monitoring unit for performing the continuous 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 level of the Raman pump energy entering the span to a safe level.
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