Semiconductor laser apparatus

H - Electricity – 01 – S

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H01S 3/13 (2006.01) H01S 5/028 (2006.01) H01S 5/068 (2006.01) H01S 5/0683 (2006.01)

Patent

CA 1295403

ABSTRACT OF THE DISCLOSURE According to this invention, in a semiconductor laser apparatus which detects a laser beam from a semiconductor laser element using a light-receiving element so as to perform automatic light power control, a temperature dependency of a power of a laser beam transmitted through an end face protection film of the semiconductor laser element and that of a detection power of the light-receiving element have inverse characteristics to each other, so that a variation in intensity of output light due to a change in temperature is minimized.

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