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Volume 31 Issue 6
Sep.  2012
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Research of mode selection in a coiled Yb3+ doped multimode double clad fiber laser

  • Received Date: 2006-09-19
    Accepted Date: 2007-01-25
  • In order to realize the monomode output in large core multimode double-clad fiber laser to suppress the nonlinear effects in high power double-clad fiber lasers,mode selection by bending the large core multimode double-clad fiber to a suitable radius was used.Theoretical analysis and experiments about mode selection in large core multimode double-clad fiber laser were demonstrated in this paper.Factors that influence the laser bending loss and output mode,such as inner-clad refractive index,core radius,laser wavelength,bending radius,were obtained.Monomode output was obtained from multimode double-clad fiber laser by bending the homemade Yb3+-doped large core multimode fiber.The laser has a fundamental mode output with power of 9W,conversion efficiency of 17.3%.The research is useful in mode selection from large core multimode double-clad fiber laser.
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  • [1]

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    SHI L,ZHAO Sh H,ZHOU W Y et al.Double-pass forward pumping broadband Er3+Yb3+ co-doped superfluorescent fiber source[J].Laser Technology,2006,30(2):148~151(in Chinese).
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Research of mode selection in a coiled Yb3+ doped multimode double clad fiber laser

  • 1. Research Center of Laser Fusion, China Academy of Engineering Physics, manyang 621900, China

Abstract: In order to realize the monomode output in large core multimode double-clad fiber laser to suppress the nonlinear effects in high power double-clad fiber lasers,mode selection by bending the large core multimode double-clad fiber to a suitable radius was used.Theoretical analysis and experiments about mode selection in large core multimode double-clad fiber laser were demonstrated in this paper.Factors that influence the laser bending loss and output mode,such as inner-clad refractive index,core radius,laser wavelength,bending radius,were obtained.Monomode output was obtained from multimode double-clad fiber laser by bending the homemade Yb3+-doped large core multimode fiber.The laser has a fundamental mode output with power of 9W,conversion efficiency of 17.3%.The research is useful in mode selection from large core multimode double-clad fiber laser.

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