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FAQ - How to commission CRP03 (forward Raman amplifier)

Publication Date:  2012-07-25 Views:  70 Downloads:  0
Issue Description
In the documentation it is explained how to adjust ON-OFF gain of SYS port for CRPC01 (backward Raman amplifier) by modifying optical power of pump groups 1 and 2, but it doesn't say anything about the case when it is needed to commission a CRPC03 (forward Raman amplifier).
Alarm Information
Handling Process
In Hedex there are recommended optical power values of Raman pump of different fibers:

Fiber Type                       P1 (Optical Power of Pump Group 1)           P2 (Optical Power of Pump Group 2)
G.652/G.655                                         +24.0 dBm                                                         +24.0 dBm
G.653                                                     +23.0 dBm                                                         +22.5 dBm

For CRPC03 just set the pump optical power to the recommended value depending on the fiber , it is not necessary to commission this Raman amplifier like CRPC01.
Root Cause
Always verify which type of external fiber is provided by customer. The optical power of pump groups depends on which type of fiber is going to be used.