Paper
16 February 2022 The study of novel inner cladding shape on absorption efficiency of thulium-doped fiber
Junjie Wang, Qiteng Zhao
Author Affiliations +
Proceedings Volume 12164, International Conference on Optoelectronic Materials and Devices (ICOMD 2021); 121640A (2022) https://doi.org/10.1117/12.2628578
Event: 2021 International Conference on Optoelectronic Materials and Devices, 2021, Guangzhou, China
Abstract
In order to enhance the output power of thulium-doped double-cladding fiber laser, the pumping absorption characteristics of fibers with different inner cladding shapes and core diameters were numerically simulated. The results showed that the pump absorption efficiency was as much as 92% when the reflection times N=50 for the novel inner cladding shape.While N=100, the pumping efficiency was as high as 99%. Based on this, the regular hexagon inner cladding and the novel inner cladding were used as working materials in the experiment, respectively. The output power of 13.2 W and 14.8 W were obtained which improved by 12.1%, and the slope efficiency was 31% and 35%, respectively. It is shown that the novel inner cladding fiber is more conducive to the realization of high efficiency pump absorption.
© (2022) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Junjie Wang and Qiteng Zhao "The study of novel inner cladding shape on absorption efficiency of thulium-doped fiber", Proc. SPIE 12164, International Conference on Optoelectronic Materials and Devices (ICOMD 2021), 121640A (16 February 2022); https://doi.org/10.1117/12.2628578
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KEYWORDS
Cladding

Absorption

Fiber lasers

Amplifiers

High power fiber lasers

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