Coherent light generators – Particular active media – Semiconductor
Patent
1997-05-19
1999-05-25
Bovernick, Rodney
Coherent light generators
Particular active media
Semiconductor
372 36, H01S 304
Patent
active
059075716
ABSTRACT:
A semiconductor laser device is provided which includes a laser diode chip mounted on a sub-mount, a monitor photo diode incorporated in the sub-mount, for monitoring a laser beam emitted by the laser diode chip, a metallic main plate mounting the laser diode chip and the monitor photo diode, an end-face breaking protective layer covering the laser diode chip and the sub-mount; and a seal resin in which the laser diode chip, the monitor photo diode, the end-face breaking preventive layer and at least a portion of the metallic main plate are sealed. In this semiconductor device, a space is provided at a portion of an interface between the end-face breaking preventive layer and the seal resin, which portion is adapted to be irradiated with a monitor laser beam emitted by the laser diode chip, with a light intensity that is not higher than a half of a peak value of the intensity of the monitor laser beam.
REFERENCES:
patent: 5140384 (1992-08-01), Tanaka
patent: 5226052 (1993-07-01), Tanaka et al.
patent: 5245620 (1993-09-01), Tanaka et al.
patent: 5327443 (1994-07-01), Tanaka et al.
Kitamura Shoji
Komatsu Ken
Mojikawa Hiromi
Ogino Shinji
Shindo Yoichi
Bovernick Rodney
Fuji Electric & Co., Ltd.
Song Yisun
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