Infrared and Laser Engineering, Volume. 51, Issue 5, 20210354(2022)

Research on high beam quality 3×1 fiber signal combiner

Min Fu1, Zhixian Li1, Zefeng Wang1,2,3, and Zilun Chen1,2,3、*
Author Affiliations
  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
  • 2Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha 410073, China
  • 3Hunan Provincial Collaborative Innovation Center of High Power Fiber Laser, Changsha 410073, China
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    In the high power synthesis schemes based on fiber signal combiner, it is one of the urgent problems to be solved in the current laser field to maintain good beam quality after beam combining. A kind of high beam quality fiber signal combiner was developed. Firstly, the model of a 3×1 fiber signal combiner was established by using simulation software, and the factors affecting the beam quality and transmission efficiency of combiner were simulated, and the theoretical values of optimum parameters of combiner were obtained. Secondly, based on the etched fiber cladding technology, a high beam quality 3×1 fiber signal combiner with an output fiber of 50/400 μm (NA=0.12) was fabricated by using the taper-fused fiber bundles technology according to simulation results. Finally, three 3 kW fiber lasers were used to test the combiner. Under the condition that the total input power is 8.95 kW, the output power after beam combining is 8.62 kW, the overall transmission efficiency is more than 96%, and the beam quality is M2=4.035.

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    Min Fu, Zhixian Li, Zefeng Wang, Zilun Chen. Research on high beam quality 3×1 fiber signal combiner[J]. Infrared and Laser Engineering, 2022, 51(5): 20210354

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    Paper Information

    Category: Lasers & Laser optics

    Received: May. 30, 2021

    Accepted: --

    Published Online: Jun. 14, 2022

    The Author Email: Chen Zilun (zilun2003@163.com)

    DOI:10.3788/IRLA20210354

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