Patent ID: 6449296
Filing Date: 2002-09-10
Classification: H01S

Abstract:
A semiconductor laser device comprising:a mounting body having a step including an upper level, a lower level and an inclined plane provided between said upper and lower levels; a semiconductor laser element emitting laser beam, said semiconductor laser element mounted on said lower level, said mounting body further having a pin-type photodiode under said upper level, said pin-type photodiode including a region of a first conductivity type, and i-type region formed on said region of first conductivity type and a region of second conductivity type formed in part of a surface of said i-type region, said lower level being located at a surface of the region of said first conductivity type, said inclined plane and said upper level being located at the surface of said i-type region, said inclined plane configured to receive said laser beam from said semiconductor laser element; one part of said laser beam emitted from said laser element being reflected by said inclined plane and being emitted to an upper direction as output light; and another part of said laser beam being incident on said i-type region through said inclined plane and being detected by said pin-type photodiode.