Semiconductor laser device

Details Semiconductor laser device Semiconductor laser device

2005-04-05

2005-04-05

Wong, Don (Department: 2821)

Coherent light generators

Particular active media

Semiconductor

C372S036000

Reexamination Certificate

active

06876685

ABSTRACT:
A laser device having at least a semiconductor laser element, a window allowing light emitted from the emission end face of the semiconductor laser element to pass therethrough, a photodetector detecting a portion of emitted light reflected from the window that is not being transmitted, and a stem whereon the semiconductor laser element and the photodetector are installed. The window is disposed vertically above the semiconductor laser element. The photodetector is placed at an angle with respect to a horizontal plane and is located contiguous with the main surface of the stem. The laser device is capable of maintaining a stable APC drive regardless of the deterioration of the semiconductor laser element that may occur from continuous oscillation for a long time.

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