| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser element capable of emitting a laser beam in the same direction for each of a plurality of drive electrodes and changing an emission direction thereof.SOLUTION: A semiconductor laser element 10A comprises an oscillation unit which generates a plurality of laser beams and outputs the plurality of generated laser beams in the same direction and a deflection unit which deflects each of the plurality of laser beams output by the oscillation unit in the same direction in a different direction. The oscillation unit comprises a lower clad layer 2, an upper clad layer 5, an active layer 3B, a first photonic crystal layer 41, and a plurality of drive electrodes E2. The deflection unit includes a second photonic crystal layer 43. The first photonic crystal layer 41 has a periodic structure in which an arrangement period of a different-refractive-index part 4B is the same across regions corresponding to a plurality of regions R. The second photonic crystal layer 43 has a periodic structure in which the arrangement period of the different-refractive-index part 4B differs for each of the regions corresponding to the plurality of regions S. |
