Patent ID: 8548024

Claim:
A semiconductor laser module, comprising: a semiconductor laser unit including a semiconductor laser substrate, and a plurality of distributed reflector (DR) semiconductor laser devices formed on the semiconductor laser substrate in an array, each of the DR semiconductor laser devices being configured to emit laser light of a different wavelength from an output facet and including an antireflection film on the output facet, a high-reflection film on a rear facet opposite to the output facet, an active area on a side of the antireflection film, and a passive area on a side of the high-reflection film; and a light selecting unit including a light selecting device substrate, and a planar lightwave circuit Mach-Zehnder interferometer (PLC-MZI) light selecting device formed on the light selecting device substrate, the PLC-MZI light selecting device being configured to selectively output the laser light emitted from each of the DR semiconductor laser devices, wherein the semiconductor laser unit and the light selecting unit are attached to each other in such a manner that the PLC-MZI light selecting device is optically coupled to the DR semiconductor laser devices.