Patent ID: 6687272
Filing Date: 2004-02-03
Classification: H01S

Abstract:
A semiconductor laser device comprising:a semiconductor laser element, having a light-emitting surface, configured to emit a light beam from the light-emitting surface, the light beam including a central part and an another part; a mount structure configured to mount the semiconductor laser element, including a semiconductor substrate having a surface, and a semiconductor layer having a sloping surface opposed to the light-emitting surface and deposited on a part of the surface of the semiconductor substrate to form a light-sensitive element having a light-receiving section on a part of the sloping surface, said light-sensitive element configured to receive the another part of the light beam from the light-emitting surface; and a total reflection mirror provided on the sloping surface of the semiconductor layer and extending in a direction perpendicular to the direction in which the sloping surface is inclined, said total reflecting mirror positioned vertically on the sloping surface to reflect and output the central part of the light beam while allowing the another part of the light beam to enter the semiconducting layer.