Linear inner cladding fiber amplifier suppressing mode instability

Zebiao Li; Zhihua Huang; Honghuan Lin; Shanhui Xu; Zhongmin Yang; Jianjun Wang; Feng Jing

doi:10.1117/12.2245848

9 November 2016 Linear inner cladding fiber amplifier suppressing mode instability

Zebiao Li, Zhihua Huang, Honghuan Lin, Shanhui Xu, Zhongmin Yang, Jianjun Wang, Feng Jing

Proceedings Volume 10016, High-Power Lasers and Applications VIII; 100160T (2016) https://doi.org/10.1117/12.2245848
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

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.

Citation Download Citation

Zebiao Li, Zhihua Huang, Honghuan Lin, Shanhui Xu, Zhongmin Yang, Jianjun Wang, and Feng Jing "Linear inner cladding fiber amplifier suppressing mode instability", Proc. SPIE 10016, High-Power Lasers and Applications VIII, 100160T (9 November 2016); https://doi.org/10.1117/12.2245848

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