SEMICONDUCTOR LASER APPARATUS

摘要

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.