9 November 2016 Linear inner cladding fiber amplifier suppressing mode instability
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We use a semi-analytical model considering pump power saturation in high power fiber laser systems of multi-kW-class to calculate mode instability threshold. A novel designed fiber, linear inner-cladding fiber, can mitigate mode instability effect by decreasing nonlinear coupling coefficient and smoothing heat profile along the fiber. We investigate strong pump absorption of linear inner-cladding fiber, leading to shorter fiber length. With 915 nm pumping, linear inner-cladding fiber can reach 10 kW output power without mode instability in theory.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zebiao Li, Zebiao Li, Zhihua Huang, Zhihua Huang, Honghuan Lin, Honghuan Lin, Shanhui Xu, Shanhui Xu, Zhongmin Yang, Zhongmin Yang, Jianjun Wang, Jianjun Wang, Feng Jing, Feng Jing, } "Linear inner cladding fiber amplifier suppressing mode instability", Proc. SPIE 10016, High-Power Lasers and Applications VIII, 100160T (9 November 2016); doi: 10.1117/12.2245848; https://doi.org/10.1117/12.2245848

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