Patent ID: 6144785
Filing Date: 2000-11-07
Classification: G02B,H01S,H04B

Abstract:
A light source with a WDM function, comprising:light source for outputting a light having a first wavelength;first optical input means for inputting the light having the first wavelength to a first optical waveguide from a first surface;second optical input means for inputting a light having a second wavelength to the first optical waveguide from a second surface on a reverse side of the first surface;an optical filter, provided between said first surface and said light source, for passing the light having the first wavelength and reflecting the light having the second wavelength;a second optical waveguide; andan optical output terminal, provided on a first surface side, for coupling a light to said second optical waveguide, wherein, a directional coupling section is formed by said first optical waveguide and said second optical waveguide, and said directional coupling section has a length equal to a complete coupling length for said light having the first wavelength, and has a half length of the complete coupling length for said light having the second wavelength.