| 摘要 |
<p>A fiber laser system is comprised of: a fiber laser apparatus (10) further comprising a fiber laser (11); a laser output-end section (20); and a delivery fiber (30) that connects the fiber laser apparatus (10) and the laser output-end section (20). The delivery fiber (30) is comprised of a double-clad fiber. An SFBG (31), which conjoins with a backward clad mode wherein a portion of laser beams propagating through the core of the delivery fiber (30) is reflected and propagated in the opposite direction through a first clad, is formed at the output-end side of the delivery fiber (30). Further, a backward-clad-mode light detection unit (32), which detects the intensity of backward-clad-mode light that is generated as a result of the conjoining of the SFBG (31) with the backward clad mode, is formed at the input-end side of the delivery fiber (30).</p> |
