Optical: systems and elements – Optical amplifier – Optical fiber
Reexamination Certificate
2007-03-29
2008-10-21
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Optical fiber
C359S334000
Reexamination Certificate
active
07440177
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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Ghera Uri
Menashe David
Shlifer Alex
Bolda Eric
EDC Optical Networks Inc.
Friedman Mark M.
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