• High Power Laser Science and Engineering
  • Vol. 9, Issue 2, 02000e23 (2021)
Xin Zhang1, Shoufei Gao2, Yingying Wang2, Wei Ding2, and Pu Wang1、*
Author Affiliations
  • 1National Center of Laser Technology, Institute of Laser Engineering, Beijing University of Technology, Beijing100124, China
  • 2Institute of Photonics Technology, Jinan University, Guangzhou510632, China
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    Abstract

    High-power fiber lasers have experienced a dramatic development over the last decade. Further increasing the output power needs an upscaling of the fiber mode area, while maintaining a single-mode output. Here, we propose an all-solid anti-resonant fiber (ARF) structure, which ensures single-mode operation in broadband by resonantly coupling higher-order modes into the cladding. A series of fibers with core sizes ranging from 40 to 100 μm are proposed exhibiting maximum mode area exceeding 5000 μm2. Numerical simulations show this resonant coupling scheme provides a higher-order mode (mainly TE01, TM01, and HE21) suppression ratio of more than 20 dB, while keeping the fundamental mode loss lower than 1 dB/m. The proposed structure also exhibits high tolerance for core index depression.
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    Xin Zhang, Shoufei Gao, Yingying Wang, Wei Ding, Pu Wang. Design of large mode area all-solid anti-resonant fiber for high-power lasers[J]. High Power Laser Science and Engineering, 2021, 9(2): 02000e23
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    Category: Research Articles
    Received: Aug. 19, 2020
    Accepted: Jan. 26, 2021
    Published Online: May. 24, 2021
    The Author Email: Pu Wang (wangpuemail@bjut.edu.cn)