Patent ID: 6522678
Filing Date: 2003-02-18
Classification: H01S

Abstract:
A multiple wavelength semiconductor laser device array comprising:a plurality of semiconductor laser devices of an end face emission type, emitting laser lights with wavelengths different from one another, said plurality of semiconductor laser devices being disposed on a same substrate; wherein a reflectivity at a light emitting end face in a first semiconductor laser device of said plurality of semiconductor laser devices is less than that of a second semiconductor laser device of said plurality of semiconductor laser devices, an emission wavelength of said second semiconductor laser device being longer than that of said first semiconductor laser device; wherein a thickness of said reflection films disposed on the light emitting end faces of said first semiconductor laser device and said second semiconductor laser device are selected so as to have a same value while the reflectivity at the light emitting end faces of said first semiconductor laser device is less that that of said second semiconductor laser device.