ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Fiber fuse behavior in kW-level continuous-wave double-clad field laser |
Jun-Yi Sun(孙骏逸), Qi-Rong Xiao(肖起榕), Dan Li(李 丹), Xue-Jiao Wang(王雪娇), Hai-Tao Zhang(张海涛), Ma-Li Gong(巩马理), Ping Yan(闫平) |
Center for Photonics and Electronics, Department of Precision Instrument, Tsinghua University, Beijing 100084, China |
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Abstract In this study, original experimental data for fiber fuse in kW-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-kW 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.
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Received: 04 June 2015
Revised: 04 August 2015
Accepted manuscript online:
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Fund: Project supported by the Key Laboratory of Science and Technology on High Energy Laser and China Academy of Engineering Physics (Grant No. 2014HEL02) and the National Natural Science Foundation of China (Grant No. 61307057). |
Corresponding Authors:
Ping Yan
E-mail: pyan@mail.tsinghua.edu.cn
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Cite this article:
Jun-Yi Sun(孙骏逸), Qi-Rong Xiao(肖起榕), Dan Li(李 丹), Xue-Jiao Wang(王雪娇), Hai-Tao Zhang(张海涛), Ma-Li Gong(巩马理), Ping Yan(闫平) Fiber fuse behavior in kW-level continuous-wave double-clad field laser 2016 Chin. Phys. B 25 014204
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