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Loss mechanism of all-fiber cascaded side pumping combiner

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Abstract

Compared with end pumping fiber combiner, one of the advantages for side pumping combiner is the unlimited pumping points, which means multi-point or cascaded side pumping can be realized. However, the loss mechanism of the cascaded structure is rarely discussed. In this paper, we present the numerical and experimental investigation about the loss mechanism of a two-stage-cascaded side pumping combiner based on tapered-fused technique. The influence of loss mechanism on the coupling efficiency and thermal load of the fiber coating is analyzed according to simulations and experiments with different tapering ratios for the first stage. Based on the analysis, a cascaded component with total pump coupling efficiency of 96.4% handling a pump power of 1088 W is achieved by employing 1018 nm fiber laser as the pump source. Future work to further improve the performance of a cascaded side pumping combiner is discussed and prospected.

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DOI:10.1017/hpl.2018.50

基金项目:This work was supported by the National Natural Science Foundation of China (No. 61370045) and the National Key R&D Program of China (No. 2017YFF0104600).

收稿日期:2018-07-10

录用日期:2018-08-31

网络出版日期:2018-09-26

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Chengmin Lei:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Zilun Chen:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Collaborative Innovation Center of High Power Fiber Laser, National University of Defense Technology, Changsha 410073, China
Yanran Gu:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Hu Xiao:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Collaborative Innovation Center of High Power Fiber Laser, National University of Defense Technology, Changsha 410073, China
Jing Hou:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Collaborative Innovation Center of High Power Fiber Laser, National University of Defense Technology, Changsha 410073, China

联系人作者:Zilun Chen(zilun2003@163.com)

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引用该论文

Chengmin Lei, Zilun Chen, Yanran Gu, Hu Xiao, and Jing Hou, "Loss mechanism of all-fiber cascaded side pumping combiner," High Power Laser Science and Engineering 6(4), e56 (2018)

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