| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser device capable of inhibiting operations of an external device from becoming unstable when the external device is operated by using a laser beam emitted from the semiconductor laser device. SOLUTION: The semiconductor laser device is provided with a semiconductor laser element chip 2 which generates a laser beam in a main wavelength region (about 785 nm), and a transmittance control layer 11 for controlling the emission of laser beams in other wavelength regions to the outside when the laser beams in other wavelength regions different from the main wavelength region are generated in the semiconductor laser element chip 2. COPYRIGHT: (C)2007,JPO&INPIT
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