Patent ID: 9660415
Date: 2017-05-23
CPC Classifications: G02F,H01S

Claim:
1. A semiconductor laser device comprising: a semiconductor laser chip; and a spatial light modulator which is optically connected to the semiconductor laser chip, wherein the semiconductor laser chip includes: the diffraction grating layer is sandwiched by the cladding lavers; the diffraction grating layer is a photonic crystal that has a periodic structure in which a refractive index is two-dimensionally varied; the diffraction grating layer includes: the diffraction grating layer is placed in the laser beam generation region and emits the laser beam in the thickness direction of the diffraction grating layer; the spatial light modulator being attached to the semiconductor laser chip in such a manner that a laser beam output in a thickness direction of the diffraction grating layer is input, modulating a phase of the laser beam with a driving voltage applied between the pixel electrodes and the common electrode, and transmitting and outputting, to the outside, the laser beam the phase of which is modulated.