Patent ID: 7075710
Filing Date: 2006-07-11
Classification: H01S

Abstract:
1. A Raman amplification method of amplifying signal light of a plurality of channels which are included in a predetermined wavelength band and which have different wavelengths by supplying pumping light of a plurality of channels having different wavelengths to an optical transmission path through which the signal light propagates, comprising: a detection step of detecting powers of at least light components having two wavelengths of propagating light containing the amplified signal light; and an adjusting step of adjusting an optical power of each of a plurality of pumping channels in the pumping light so as to make an optical power of the amplified signal light constant in the predetermined wavelength band, on the basis of both a power of at least a light component having one wavelength of the detected light components having the two wavelengths and a power difference amount between the detected light components having the two wavelengths.