Patent ID: 7110166
Filing Date: 2006-09-19
Classification: H01S,H04B

Abstract:
1. An optical transmission system comprising: an optical transmission path transmitting wavelength division multiplexed (WDM) light; a plurality of Raman pump light sources with different wavelengths, supplying Raman pump light to the optical transmission path; a demultiplexing unit demultiplexing the WDM light from the transmission path into a plurality of wavelength bands; a first amplifier amplifying one of the demultiplexed light; a second amplifier amplifying another one of the demultiplexed light; a multiplexing unit combining output light of the first and second amplifiers; a monitoring unit monitoring the combined light of the multiplexing unit; and a control unit controlling the plurality of Raman pump light sources based on the output from the monitoring unit.