中国物理B ›› 2017, Vol. 26 ›› Issue (3): 34205-034205.doi: 10.1088/1674-1056/26/3/034205

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Fiber core mode leakage induced by refractive index variation in high-power fiber laser

Ping Yan(闫平), Xuejiao Wang(王雪娇), Yusheng Huang(黄昱升), Chen Fu(付晨), Junyi Sun(孙骏逸), Qirong Xiao(肖起榕), Dan Li(李丹), Mali Gong(巩马理)   

  1. Center for Photonics and Electronics, Department of Precision Instruments, Tsinghua University, Beijing 100084, China
  • 收稿日期:2016-09-19 修回日期:2016-11-17 出版日期:2017-03-05 发布日期:2017-03-05
  • 通讯作者: Dan Li E-mail:dli@mail.tsinghua.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61307057 and 61675114).

Fiber core mode leakage induced by refractive index variation in high-power fiber laser

Ping Yan(闫平), Xuejiao Wang(王雪娇), Yusheng Huang(黄昱升), Chen Fu(付晨), Junyi Sun(孙骏逸), Qirong Xiao(肖起榕), Dan Li(李丹), Mali Gong(巩马理)   

  1. Center for Photonics and Electronics, Department of Precision Instruments, Tsinghua University, Beijing 100084, China
  • Received:2016-09-19 Revised:2016-11-17 Online:2017-03-05 Published:2017-03-05
  • Contact: Dan Li E-mail:dli@mail.tsinghua.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61307057 and 61675114).

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摘要： This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations. A model of the power transfer between the core modes and the cladding modes during thermally-induced refractive index variations is established based on the mode coupling theory. The results of numerical simulations based on actual laser parameters are presented. Experimental measurements were also carried out, the results showed good agreement with the corresponding simulation results.

关键词: double-clad fiber laser and amplifier, core loss, cladding mode, mode coupling theory

Abstract: This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations. A model of the power transfer between the core modes and the cladding modes during thermally-induced refractive index variations is established based on the mode coupling theory. The results of numerical simulations based on actual laser parameters are presented. Experimental measurements were also carried out, the results showed good agreement with the corresponding simulation results.

Key words: double-clad fiber laser and amplifier, core loss, cladding mode, mode coupling theory

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.60.Da (Resonators, cavities, amplifiers, arrays, and rings) 42.55.Xi (Diode-pumped lasers)