| 摘要 |
PURPOSE:To manufacture a semiconductor laser device with a photodiode for monitor operating even when a power supply having both polarity is not used by working the photodiode and a semiconductor laser diode by a single power supply. CONSTITUTION:Laser beams emitted from a laser-beam outgoing end surface 9 for an active layer 7 are received by a photodiode 3 and monitored. laser beams emitted from a laser-beam outgoing end surface 10 are projected outside a semiconductor laser device as original laser beams. Since the semiconductor laser device electrically isolates a section, with which a laser diode 5 is bonded, by a P-type semiconductor region 4, there is no relationship of electrical connection between the photodiode 3 and the laser diode 5. Accordingly, the photodiode 3 and the laser diode 5 can each be connected to a power supply separately, and even a positive power supply and even a negative power supply can also be used without hindrance.
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