| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser pumped laser device in which operation is continued even when semiconductor lasers are failed in a part of a plurality of semiconductor lasers comprising an exciting light source. SOLUTION: A laser device 1 is provided with a power source 2, and semiconductor laser elements LD1-LD4 are serially connected. Relays R1-R4 are in connected parallel to the semiconductor laser elements LD1-LD4. It is detected whether a circuit 5 composed of the semiconductor laser elements LD1-LD4 and the relays R1-R4 is conducted or disconnected, and the detected result is outputted as a detecting signal S1. When it is detected from the detecting signal S1 that the circuit 5 is disconnected, a controller 6 outputs a relay control signal S2 to an opener/closer 4 and successively short-circuits the relays R1-R4. When it is detected from the detecting signal S1 that the circuit 5 is conducted again, the relays which are short-circuited at such a time point are continuously short-circuited as they are. COPYRIGHT: (C)2004,JPO |
