Patent ID: 7864820

Claim:
A laser light source device comprising: a plurality of laser modules, each laser module comprising a laser light source, an intensity modulation unit to apply intensity modulation to a laser light beam emitted from the laser light source, and a first optical waveguide to receive the intensity-modulated laser light from the laser light source and output the intensity-modulated laser light beam from an output end of the first optical waveguide; and a second optical waveguide comprising an input end, the input end being optically connected to a light outputting area of the first optical waveguides of the laser modules to receive the laser light beams outputted from the first optical waveguides, the first optical waveguides being closely bundled in the vicinity of output ends of the first optical waveguides, wherein a core of the second optical waveguide at the input end is larger than the light outputting area and the second optical waveguide reduces a residual polarized component of each of the laser light beams that propagate through the second optical waveguide.