| 摘要 |
<p>This Q-switched fiber laser is equipped with a resonator-use optical fiber (8), rare earth-doped optical fiber (3) for optical pulse amplification, a Q-switching device (4), resonators (1, 2) for resonating emitted natural light or emitted stimulated light, a partial feedback optical path (5) that has a branching part (5A) and a propagation distance extending part (5B) and is provided between the resonators (1, 2). The branching part (5A) is configured such that light incident into the partial feedback optical path (5) is separated into light to be output into the resonator-use optical fiber (8) and light to be output into the propagation distance extending part (5B) at a pre-determined optical power ratio. The propagation distance extending part (5B) is configured such that by propagating the light incident into the partial feedback optical path (5) within a predetermined optical path length, the propagation distance of the light is extended before the light is emitted into the branching part (5A) again.</p> |
