Fiber fuse behavior in k W-level continuous-wave double-clad field laser

• 作 者: 孙骏逸 肖起榕 李丹 王雪娇 张海涛 巩马理 闫平
• 机 构: Center for Photonics and Electronics, Department of Precision Instrument, Tsinghua University,
• 出 处: Chinese Physics B
• 发表日期: 2016年01期
• 关键词: catastrophic destruction shaped attributed ignition think diameters formations s

In this study, original experimental data for fiber fuse in k W-level continuous-wave(CW) high power double-clad fiber(DCF) laser are reported. The propagating velocity of the fuse is 9.68 m/s in a 3.1-k W Yb-doped DCF laser. Three other cases in Yb-doped DCF are also observed. We think that the ignition of fiber fuse is caused by thermal mechanism,and the formation of bullet-shaped tracks is attributed to the optical discharge and temperature gradient. The inducements of initial fuse and formation of bullet-shaped voids are analyzed. This investigation of fiber fuse helps better understand the fiber fuse behavior, in order to avoid the catastrophic destruction caused by fiber fuse in high power fiber laser.

The original experimental data for fiber fuse in k W-level continuous-wave (CW) high power double-clad fiber (DCF) laser are reported. The propagating velocity of the fuse is 9.68 m / s in a 3.1-k W think of the ignition of fiber fuse is caused by thermal mechanism, and the formation of bullet-shaped tracks is attributed to the optical discharge and temperature gradient The investigations of fiber fuse behavior, in order to avoid the catastrophic destruction caused by fiber fuse in high power fiber laser.