Patent ID: 6865197
Filing Date: 2005-03-08
Classification: H01S

Abstract:
1. A laser diode module comprising: a laser diode device generating radiation, having an optical axis, a front surface through which front radiation is emitted, and a back surface through which back radiation is emitted; an optical device having an optical axis coaxial with the optical axis of said laser diode device, located opposite the front surface of said laser diode device, and reflecting some of the front radiation emitted from the front surface of said laser diode device; and a light-detecting device located proximate the back surface of said laser diode device and displaced from the optical axis of said laser diode device, for detecting a part of the front radiation reflected from said optical device and a part of the back radiation, the part of the front radiation detected by said light-detecting device exceeding in amount the part of the back radiation detected by said light-detecting device.