| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved laser device which consists of a laser to be optically pumped and a semiconductor laser for optically pumping the laser, wherein the device has improved efficiency in optical pumping; the structure size of the laser device is relatively small; and manufacturing cost is relatively low, and to provide a semiconductor laser advantageous in optically pumping the laser. SOLUTION: In the laser device, the semiconductor laser comprises a plurality of active regions integrated monolithically and arranged in a stack, and at least two or more active regions emit pumping beam of different wavelengths. The semiconductor laser has a plurality of active regions integrated monolithically and arranged in the stack, and at least two or more active regions emit pumping beam of different wavelengths. COPYRIGHT: (C)2008,JPO&INPIT |
