| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-wavelength semiconductor laser element and a multi-wavelength semiconductor laser device that have a small amount of power consumption and are stable thermally and mechanically. SOLUTION: The multi-wavelength semiconductor laser device comprises: a first semiconductor laser element 12 that is formed on the main surface of a substrate, and radiates oscillation light having a specific wavelength; a second semiconductor laser element 13 that is arranged closely in parallel with a light axis, so that the light axis of the first semiconductor laser element 12 is essentially coaxial to that of oscillation light and is shorter than resonator length L1 of the first semiconductor laser element 12, has resonator length L2 that is shorter than resonator length L1 of the first semiconductor laser element 12, and radiates oscillation light having a wavelength that differs from the specific wavelength; electrodes 17, 18, 19 that have an electrical continuity with the active layers of the first and second semiconductor laser elements 12, 13; and a projection 14 that is arranged close to a side in parallel with the light axis of the first semiconductor laser element 12, and on an end face vertical to the light axis of the second semiconductor laser element 13 while an insulating film 20 is formed on the upper surface. COPYRIGHT: (C)2006,JPO&NCIPI
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