| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser device and optical integrated semiconductor device which continuously change the lasing wavelength while suppressing mode hopping more reliably. SOLUTION: A distributed feedback semiconductor laser device 10 in which the lasing wavelength is changed includes: a semiconductor layer portion 20 including a first active layer 20A, a second active layer 20B, and an intermediate layer 20C that optically couples the first active layer and the second active layer, the first active layer, the intermediate layer, and the second active layer being arranged in this order in a predetermined axis direction; a diffraction grating 26 that is optically coupled with the first active layer 20A and the second active layer 20B of the semiconductor layer portion 20; a first electrode 28A for injecting carriers into the first active layer 20A; a second electrode 28B for injecting carriers into the second active layer 20B; and a third electrode 28C for supplying the intermediate layer 20C with electric current, wherein the diffraction grating 26 extends in the predetermined axis direction, and a periodΛof the diffraction grating is uniform in the predetermined axis direction. COPYRIGHT: (C)2009,JPO&INPIT
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