SEMICONDUCTOR LASER DEVICE

摘要

This semiconductor laser device includes a semiconductor laser chip and a spatial light modulator SLM which is optically connected to the semiconductor laser chip. The semiconductor laser chip LDC includes an active layer 4, a pair of cladding layers 2 and 7 sandwiching the active layer 4, and a diffraction grating layer 6 which is optically connected to the active layer 4. The spatial light modulator SLM includes a common electrode 25, a plurality of pixel electrodes 21, and a liquid crystal layer LC arranged between the common electrode 25 and the pixel electrodes 21. A laser beam output in a thickness direction of the diffraction grating layer 6 is modulated and reflected by the spatial light modulator SLM and is output to the outside.

主权项

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
an active layer,a pair of cladding layers sandwiching the active layer, anda diffraction grating layer which is optically connected to the active layer, and the spatial light modulator includes
a common electrode,a plurality of pixel electrodes, anda liquid crystal layer arranged between the common electrode and the pixel electrodes, 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 through transparent one of the common electrode and the pixel electrodes, modulating a phase of the laser beam in each minute region with a driving voltage applied between the pixel electrodes and the common electrode, and reflecting and outputting, to the outside, the laser beam the phase of which is modulated.