| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high output and high reliability at a low cost in a laser module comprising semiconductor laser elements, optical fibers, and a converging optical system for converging laser beams emitted from the semiconductor laser elements and coupling the beams to the incident end of an optical fiber. SOLUTION: Eight pieces of GaN semiconductor laser elements LD1 to LD8 fixedly aligned on a heat block (heat-sink block) 10, collimator lenses 11, and a condenser lens 12 are fixedly arranged in a package 40 having a light exiting window 16 covered with a light transmission member 15 on the wall surface. In the state that the laser elements LD1 to LD8, collimator lens 11, and the condenser lens 12 are arranged and fixed so that the laser beams emitted from the laser elements LD1 to LD8 are converged on the outside surface 15a of the light transmission member 15, the inside of the package 40 is degassed and hermetically sealed, and thereafter, the incident end of the optical fiber 13 is pressed into close contact with the light exiting window 15 for fixing. COPYRIGHT: (C)2004,JPO&NCIPI
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