Patent ID: 7916384
Filing Date: 2011-03-29
Classification: H01S,H04B

Abstract:
1. A dynamic gain control circuit for a wave division multiplexing system comprising a multi-wavelength-pumped Raman fiber amplifier, the dynamic gain control circuit for monitoring only a single optical signal wavelength selected from a plurality of wavelengths transmitted via the wave division multiplexing system, controlling a plurality (M) of Raman pumps based on an output power at the single optical signal wavelength, using the output power as a feedback signal for controlling the plurality (M) of Raman pumps wherein a required power adjustment (ΔP L ) for a jth Raman pump (j=1 to M) of the plurality (M) of Raman pumps is based on a linear function of a total input signal power variation (ΔS L ), the linear function being defined as wherein C