| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser light source having high durability for high power output. SOLUTION: The laser light source 1 is an optical device that pulse oscillates laser light, and is provided with: a resonator forming a resonance optical path; a rare earth element doped fiber 11; pumping means, Q switch means; and a condensing lens 18. A fiber is inserted on the resonance optical path and outputs radiation light by supply of pumping energy. The pumping means continuously supplies pumping energy to the fiber. The Q switch means modulates resonator loss of the resonator. The condensing lens condenses the radiation light output from the edge of the fiber. The Q switch means is disposed at the condensing point of radiation light which is condensed by the condensing lens, and mechanically changes formation and interruption of the resonance optical path by transmitting or interrupting the radiation light in the contributing portion. Since the Q switch means which mechanically changes formation and interruption of the resonance optical path has higher durability compared with a Q switch means by an acousto-optical element to radiation light of high power output, the damage to the laser light source is controlled. COPYRIGHT: (C)2010,JPO&INPIT
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