SEMICONDUCTOR LASER DEVICE

摘要

This semiconductor laser device is provided with: a semiconductor laser bar 11 which emits a plurality of beams having different wavelengths from connected emission regions; a light condensing optical system 13 which condenses the plurality of beams; a wavelength dispersion optical system 14 having a wavelength dispersion function; an optical filter 15 in which the wavelengths of the transmitted beams are cyclically different; an aperture 16 disposed on the optical path for the plurality of beams superposed on the same axis; and a partial reflection mirror 17. A total reflection mirror 19 is formed on the rear surface of the semiconductor laser bar 11, and each wavelength of the plurality of beams having different wavelengths, which are reflected by the total reflection mirror 19 and emitted from the semiconductor laser bar 11, is the same as the wavelength of the beam transmitted by the optical filter 15.