Patent ID: 6362876
Filing Date: 2002-03-26
Classification: G01J,H01S

Abstract:
A laser beam power detecting device for a planar type semiconductor laser d iode, comprising:a planar printed circuit board; a heat dissipation substrate mounted on the printed circuit board; a laser diode mounted on the heat dissipation substrate, emitting a first laser beam and a second laser beam: a light reflecting plate mounted on the printed circuit board and extending at a right angle to the plane of the circuit board, the light reflecting panel located at a rear area of the heat dissipation substrate to reflect the second laser beam emitted from the laser diode; and, a light detecting diode located at a middle section between the laser diode and the light reflecting plate and receiving the reflected laser beam reflected by the light reflecting plate, thereby detecting an output power of the first laser beam emitted by the laser beam.