Main > HPArticle > Alignment and efficiency-monitoring method of high-power fiber-to-fiber coupling
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  • Manuscript Accepted: Nov. 7, 2019

    Online Published: Nov. 7, 2019

Chinese Optics Letters, 2020, Vol. 18, Issue 2, pp.

Alignment and efficiency-monitoring method of high-power fiber-to-fiber coupling

Kong Qingqing, Jing Yiqiu, Shen Hua, Deng Shiwei, han zhigang, Zhu Ri Hong

Author Affiliations

  • Nanjing University of Science and Technology
  • Nanjing University of Science and Technology
  • Nanjing University of Science and Technology
  • Nanjing University of Science and Technology

Abstract

High-power fiber-to-fiber coupling is extensively used in fiber laser applications, and its performance is determined by coupling efficiency. We demonstrate a novel method for alignment and monitoring efficiency by detecting backscattering power at the fiber end cap. The relationship between alignment error and backscattering power is determined by simulations and experiments. Through this method, a state-of-art kW-level Fiber-to-Fiber Optic Switch (FFOS) is developed (transmission efficiency >97%). It performs well for longer than 60 minutes. To the best of our knowledge, it is the first time to establish the mathematical model based on the method. Our results can provide guidance in high-power fiber-to-fiber coupling.

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