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5 March 2018 Partially doped fiber design for suppressing transverse mode instability
Zebiao Li, Chengyu Li, Chao Guo, Honghuan Lin, Jianjun Wang, Feng Jing, Shanhui Xu, Zhongmin Yang
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Proceedings Volume 10710, Young Scientists Forum 2017; 107103J (2018) https://doi.org/10.1117/12.2317470
Event: Young Scientists Forum 2017, 2017, Shanghai, China
Abstract
Transverse mode instability becomes the main limit for power scaling of high power fiber lasers with nearly diffraction-limited beam. Compared to conventional step index fiber, this paper proposes a partially doped fiber, which can decrease coupling coefficient between fundamental mode and higher order mode. Based on a coupled mode model, this designed fiber is proved to suppress transverse mode instability effect and promising for power scaling of fiber lasers. Furthermore, we investigate the impact of doped region on transverse mode instability threshold, and propose a partially doped fiber, which can realize 5 kW in single mode regime theoretically.
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Zebiao Li, Chengyu Li, Chao Guo, Honghuan Lin, Jianjun Wang, Feng Jing, Shanhui Xu, and Zhongmin Yang "Partially doped fiber design for suppressing transverse mode instability", Proc. SPIE 10710, Young Scientists Forum 2017, 107103J (5 March 2018); https://doi.org/10.1117/12.2317470
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KEYWORDS
High power fiber lasers
Fiber lasers
Optical design
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