›› 2014, Vol. 23 ›› Issue (9): 94207-094207.doi: 10.1088/1674-1056/23/9/094207

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

Specific mode output from multimode fiber oscillators by designing rare earth doping profiles

王文亮, 黄良金, 冷进勇, 郭少锋, 姜宗福   

  1. College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2014-04-23 修回日期:2014-05-05 出版日期:2014-09-15 发布日期:2014-09-15

Specific mode output from multimode fiber oscillators by designing rare earth doping profiles

Wang Wen-Liang (王文亮), Huang Liang-Jin (黄良金), Leng Jin-Yong (冷进勇), Guo Shao-Feng (郭少锋), Jiang Zong-Fu (姜宗福)   

  1. College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2014-04-23 Revised:2014-05-05 Online:2014-09-15 Published:2014-09-15
  • Contact: Leng Jin-Yong E-mail:lengjy@sina.com

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摘要： Based on rate equations, a theoretical model of a fiber oscillator with a multimode gain fiber was built. We studied the effect of the rare earth doping profile in the core on the output characteristics of the multimode fiber oscillator. The results indicated that a pure fundamental mode can be obtained by partly doping the core of the large mode area (LMA) ytterbium doped fiber (YDF) in the fiber laser. Furthermore, a sole specific high-order mode can also be implemented by tailoring the rare earth doping profile according to the simulations. The mode coupling effect was also taken into account in the model. In spite of the mode coupling effect, the specific mode was able to dominate in the output of the fiber laser by utilizing the designed LMA YDF.

关键词: fiber laser, rare earth doping profile, specific mode

Abstract: Based on rate equations, a theoretical model of a fiber oscillator with a multimode gain fiber was built. We studied the effect of the rare earth doping profile in the core on the output characteristics of the multimode fiber oscillator. The results indicated that a pure fundamental mode can be obtained by partly doping the core of the large mode area (LMA) ytterbium doped fiber (YDF) in the fiber laser. Furthermore, a sole specific high-order mode can also be implemented by tailoring the rare earth doping profile according to the simulations. The mode coupling effect was also taken into account in the model. In spite of the mode coupling effect, the specific mode was able to dominate in the output of the fiber laser by utilizing the designed LMA YDF.

Key words: fiber laser, rare earth doping profile, specific mode

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.81.Qb (Fiber waveguides, couplers, and arrays) 78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))