| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulse fiber laser device of an MOPA system for preventing spontaneous emission light generated at power amplification parts (PA parts) from being made incident on a seed pulse generation part (MO part) and a front stage PA part without using an expensive isolator with high power resistance, and whose device size does not become large even when the PA parts are provided at multistage, and a pulse light output control method.SOLUTION: The pulse fiber laser device is constituted so as to emit a laser beam as pulse light, to prevent spontaneous emission light generated at a resonance path, a sub-amplification path, an emission path or an amplification emission path from being made incident on other path, and to take isolation among the respective paths by providing the resonance path of the pulse fiber laser device with optical path branching means, connecting the sub-amplification path, the emission path or the amplification emission path to the optical path branching means, and switching propagation paths of the laser beam which resonates in the resonance path by the optical path branching means. |
