Patent ID: 8849128
Filing Date: 2014-09-30
Classification: H01S,H04B

Abstract:
1. A multi-wavelength light source, comprising: an optical frequency shifter to shift a frequency of input light by an amount of frequency shift that has been set; a seed light source generation unit to input light having a plurality of different frequencies to the optical frequency shifter; a circulation path to make output from the optical frequency shifter circulate to an input side of the optical frequency shifter; an optical spectral shaper capable of setting an amount of attenuation individually for light of each frequency output from the optical frequency shifter so as to transmit only light of a set frequency; and a controller to control a frequency output from the seed light source generation unit and the amount of attenuation by the optical spectral shaper on the basis of at least one of a number of carriers, a carrier arrangement, and a carrier frequency interval.