SEMICONDUCTOR LASER DEVICE, SEMICONDUCTOR LASER MODULE AND RAMAN AMPLIFIER USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor laser device and a semiconductor laser module suitable for a light source for a raman amplifier obtaining a high gain stably. SOLUTION: An optical waveguide 4 having a diffraction grid 13 is provided on the emitting side of a GRIN-SCH-MQW active layer 3 emitting laser beams to output the laser beams including at least two oscillation vertical modes within the half value width of an oscillation wavelength spectrum by combination-setting an oscillation parameter including a gain area formed by the GRIN-SCH-MQW active layer 3 and the wavelength selection characteristic of the diffraction grid 13.