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Chin. Phys. B, 2014, Vol. 23(9): 094207    DOI: 10.1088/1674-1056/23/9/094207
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

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)
College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China
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.
Keywords:  fiber laser      rare earth doping profile      specific mode  
Received:  23 April 2014      Revised:  05 May 2014      Accepted manuscript online: 
PACS:  42.55.Wd (Fiber lasers)  
  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))  
Corresponding Authors:  Leng Jin-Yong     E-mail:  lengjy@sina.com

Cite this article: 

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) Specific mode output from multimode fiber oscillators by designing rare earth doping profiles 2014 Chin. Phys. B 23 094207

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