| 摘要 |
PROBLEM TO BE SOLVED: To obtain a multiplex laser light source producing a high output at a low cost. SOLUTION: Laser beams B1-7 emitted from a plurality of semiconductor lasers LD1-7 are condensed through a condensing optical system consisting of collimator lenses 11-17 and a condenser lens 20, for example, before multiplexed in a multimode optical fiber 30. In this regard, single cavity nitride based compound semiconductor lasers LD1-7 are employed in a chip state and mounted on a heat dissipation block 10 made of Cu or a Cu alloy through a submount 9. The submount 9 is formed 200-400μm thick using a material having a thermal expansion coefficient of 3.5-6.0×10<SP>-6</SP>/°C, and the semiconductor lasers LD1-7 are bonded to the submount 9 with its junction down by dividing an AuSn eutectic point solder and a metallization layer into a plurality of parts in the bonding face. COPYRIGHT: (C)2004,JPO |
