Internal Features of Fiber Fuse in a Yb-Doped Double-Clad Fiber at 3kW
Qi-Rong Xiao, Jia-Ding Tian, Yu-Sheng Huang, Xue-Jiao Wang, Ze-Hui Wang, Dan Li** , Ping Yan, Ma-Li Gong
Center for Photonics and Electronics, Department of Precision Instrument, Tsinghua University, Beijing 100084
Abstract ：We study internal features of fiber fuse in a Yb-doped double-clad fiber. The samples of fiber fuse are acquired at the power level of 3 kW in an all-fiber forward-pumped master oscillator power amplifier configuration fiber laser that is built specially for fiber fuse analyses. At this high power level, drastic refractive-index redistribution arises in an expended high refractive index area around the bullet-shaped voids of fiber fuse. Electron spin resonance analyses on post-fiber-fuse samples of the Yb-doped double-clad fiber indicate rising Frenkel defect concentration, meanwhile showing a new resonance center that is different from the ones of the Ge-doped fibers studied previously. This new resonance center probably suggests the generation of Al-oxygen hole center, a kind of defect formed during the catastrophic fuse process.
收稿日期: 2017-12-18
出版日期: 2018-04-30
:
42.81.-i
(Fiber optics)
42.55.Wd
(Fiber lasers)
71.55.-i
(Impurity and defect levels)
61.72.Hh
(Indirect evidence of dislocations and other defects (resistivity, slip, creep, strains, internal friction, EPR, NMR, etc.))
引用本文:
. [J]. 中国物理快报, 2018, 35(5): 54201-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/35/5/054201
或
https://cpl.iphy.ac.cn/CN/Y2018/V35/I5/54201
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2018, Vol. 35 
