Method and system for improved eye protection safety of...

Details Method and system for improved eye protection safety of... Method and system for improved eye protection safety of...

2007-10-16

2007-10-16

Keith, Jack (Department: 3663)

Optical: systems and elements

Optical amplifier

Raman or brillouin process

Reexamination Certificate

active

11464198

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.

REFERENCES:
patent: 6433922 (2002-08-01), Ghera et al.
patent: 6441951 (2002-08-01), Tanaka et al.
patent: 6519082 (2003-02-01), Ghera et al.
patent: 7031049 (2006-04-01), Kamada et al.
patent: 2005/0024712 (2005-02-01), Hiraizumi et al.
patent: 2005/0213196 (2005-09-01), Ishikawa et al.
patent: WO 2004105275 (2004-12-01), None

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