Patent ID: 8019189

Claim:
A laser light source device comprising: a laser module comprising a light source and a first optical waveguide, wherein light emitted from the light source is outputted from an output end of the first optical waveguide; a second optical waveguide connected to the first optical waveguide, wherein the light outputted from the output end of the first optical waveguide is inputted to an input end of the second optical waveguide and guided through the second optical waveguide; and an intensity modulation unit disposed in the vicinity of the second optical waveguide, the intensity modulation unit applying intensity modulation to the second optical waveguide, wherein a core diameter at the input end of the second optical waveguide is larger than a core diameter at the output end of the first optical waveguide, wherein the first optical waveguide is connected to the second optical waveguide in a position where an optical axis at the output end of the first optical waveguide is offset from an optical axis at the input end of the second optical waveguide, and a core at the output end of the first optical waveguide is positioned within an extent of a core at the input end of the second optical waveguide in the offset position.