Patent ID: 6992816
Filing Date: 2006-01-31
Classification: H01S

Abstract:
1. An apparatus for compensating for the gain-spectrum-tilt due to a temperature change of a fiber amplifier with a two-stage structure, comprising: a dispersion-compensating fiber (DCF) located between a first amplification stage and a second amplification stage to compensate for dispersion of an optical signal output from the first amplification stage and perform Raman amplification of the optical signal using input pumping light; at least one pumping light provision means for providing forward or backward pumping light to the DCF; first and second temperature detection means for detecting temperature variations of the first and second amplification stages, respectively; and control means for controlling intensity of the pumping light of the pumping light provision means according to the detected temperature variations; wherein the gain-spectrum-tilt of the fiber amplifier is compensated for by controlling the intensity of the pumping light.