Patent ID: 6320695
Filing Date: 2001-11-20
Classification: H01S

Abstract:
An optical amplifier apparatus comprising an optical fiber for amplification, which amplifies signal light, a plurality of pumping light sources for generating pumping light of oscillating wavelengths different from each other, a plurality of optical reflectors having reflection center wavelengths different from each other, which are connected to said pumping light sources so as to correspond to each of said pumping light sources one by one and stabilize oscillating wavelengths of said pumping light, an optical multiplexer for multiplexing pumping light of the pumping light sources, passed through the respective reflectors, and an optical coupler for multiplexing the pumping light from said optical multiplexer to signal light passing through said optical fiber for amplification, wherein said plurality of optical reflectors and said optical multiplexer are formed of materials whose differential coefficients of changes in the center wavelength with respect to changes in temperature in the usage wavelength band are almost equal to each other, set wavelengths of respective input ports in said optical multiplexer are almost coincident with the center wavelengths of the optical reflectors at the input side, and the respective optical reflectors and optical multiplexer are disposed in almost the same environmental temperature atmosphere.