Patent ID: 6331907
Filing Date: 2001-12-18
Classification: H01S,H04B,H04J

Abstract:
A discrete-wavelength-variable light source for selectively supplying at least one discrete wavelength in output laser light, comprising:a selectively demultiplex/amplifier for selectively demultiplexing at least one predetermined wavelength from an input light and optically amplifying them, wherein the selective demultiplex/amplifier comprises a wavelength demultiplexer to demultiplexer the input light into a plurality of predetermined wavelengths, a first optical switch to select one of said wavelengths from said wavelength demultiplexer, an optical amplifier to amplify an optical output of the first optical switch, a wavelength multiplexer to wavelength-multiples a plurality of optical inputs, and a second optical switch to supply an optical output of the optical amplifier to an input of said wavelength multiplexer corresponding to the wavelength selected by the first optical switch; andan optical splitter to split part of an optical output from the selective demultiplex/amplifier to transfer it to the selective demultiplex/amplifier and to externally supply a remainder of the optical output from said selective demultiplex/amplifier.