›› 2015, Vol. 24 ›› Issue (2): 24207-024207.doi: 10.1088/1674-1056/24/2/024207

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

A novel method of evaluating large mode area fiber design by brightness factor

张海涛a, 陈丹b, 任海翠a, 闫平a, 巩马理a   

  1. a Center for Photonics and Electronics, State Key Laboratory of Tribology, Department of Precision Instruments, Tsinghua University, Beijing 100084, China;
    b Southwest Institute of Technical Physics, Chengdu 610041, China
  • 收稿日期:2014-07-03 修回日期:2014-08-16 出版日期:2015-02-05 发布日期:2015-02-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61475081).

A novel method of evaluating large mode area fiber design by brightness factor

Zhang Hai-Tao (张海涛)a, Chen Dan (陈丹)b, Ren Hai-Cui (任海翠)a, Yan Ping (闫平)a, Gong Ma-Li (巩马理)a   

  1. a Center for Photonics and Electronics, State Key Laboratory of Tribology, Department of Precision Instruments, Tsinghua University, Beijing 100084, China;
    b Southwest Institute of Technical Physics, Chengdu 610041, China
  • Received:2014-07-03 Revised:2014-08-16 Online:2015-02-05 Published:2015-02-05
  • Contact: Zhang Hai-Tao, Gong Ma-Li E-mail:zhanghaitao@mail.tsinghua.edu.cn;gongml@mail.tsinghua.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61475081).

摘要: A novel evaluation term and a more reasonable criterion, which is described by a new parameter of brightness factor for active large mode area fiber design, are presented. The brightness factor evaluation method is based on the transverse mode competition mechanism in fiber lasers and amplifiers. The brightness factor can be seen as a description of fiber general property since it can represent the output laser brightness of the fiber laser system and because of its ability to resist the nonlinear effect. A core-doped active large pitch fiber with a core diameter of 190 μ and a mode-field diameter of 180 μm is designed by this method, and the designed fiber allows effective single-mode operation.

关键词: brightness factor, large pitch fiber, mode competition

Abstract: A novel evaluation term and a more reasonable criterion, which is described by a new parameter of brightness factor for active large mode area fiber design, are presented. The brightness factor evaluation method is based on the transverse mode competition mechanism in fiber lasers and amplifiers. The brightness factor can be seen as a description of fiber general property since it can represent the output laser brightness of the fiber laser system and because of its ability to resist the nonlinear effect. A core-doped active large pitch fiber with a core diameter of 190 μ and a mode-field diameter of 180 μm is designed by this method, and the designed fiber allows effective single-mode operation.

Key words: brightness factor, large pitch fiber, mode competition

中图分类号:  (Lasers)

  • 42.55.-f
42.55.Wd (Fiber lasers)