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FENG Guang, CAO Xiang-jie, SHANG Wei-dong, HUANG Wei, GUO Zhan-bin. Effect of higher order modes of fiber laser on the characteristics of coherent combination[J]. LASER TECHNOLOGY, 2009, 33(5): 555-557,560. DOI: 10.3969/j.issn.1001-3806.2009.05.021
Citation: FENG Guang, CAO Xiang-jie, SHANG Wei-dong, HUANG Wei, GUO Zhan-bin. Effect of higher order modes of fiber laser on the characteristics of coherent combination[J]. LASER TECHNOLOGY, 2009, 33(5): 555-557,560. DOI: 10.3969/j.issn.1001-3806.2009.05.021

Effect of higher order modes of fiber laser on the characteristics of coherent combination

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  • Received Date: November 07, 2008
  • Revised Date: January 04, 2009
  • Published Date: October 24, 2009
  • In order to study the effect of higher order modes of a fiber laser on the characteristics of coherent combination,the fundamental mode and higher order modes in a double-clad fiber laser were approximated to a linear combination of Laguerre-Gaussian beams.Based on its propagation law,the far field distribution of fiber laser array was obtained with consideration of higher order modes.The peak intensity and fringe visibility of a fiber laser array mixing with higher modes of LP01 and LP11and mixing with higher modes of LP01and LP02 were analyzed respectively.The numerical results show that the peak intensity decreases linearly with LP11 increasing and that the fringe visibility decreases linearly with LP02 increasing.
  • [1]
    WANG Sh Y,LIN D Y,WANG Ch.Recent progress of fiber[J].Laser Technology,2005,29(6):657-661(in Chinese).
    [2]
    XIAO R,HOU J,JIANG Ch F.Coherent combining of fiber lasers[J].Laser Technology,2005,29(5):516-518(in Chinese).
    [3]
    LI Y Zh,QIAN L J,LU D Q,et al.Coherent and incoherent combining of fiber array with hexagonal ring distribution[J].Optics & Laser Technology,2007,39(5):957-963.
    [4]
    GAPONTSEV V,GAPONTSEV D,PLATONOV N,et al.2kW CW ytterbium fiber laser with record diffraction-limited brightness[C]//Conference on Lasers and Electro-Optics Europe.Munich:IEEE,2005:508-510.
    [5]
    CHENG Zh L,HOU J,JIANG Ch F.Theoretical study on thermal effect in Yb-doped double-clad high power fiber laser[J].Laser Technology,2007,31(5):544-547(in Chinese).
    [6]
    LIAO Y B.Fiber optics[M].Beijing:Tsinghua University Press,2000:153-158(in Chinese).
    [7]
    HILL C A,HALL D R.Coupling loss theory of single-mode waveguide resonators[J].Appl Opt,1985,24(9):1283-1290.
    [8]
    FU Y Q,FENG G Y,ZHANG D Y,et al.M2 factor of linear polarization modes in a step-index fiber[J].Acta Photonica Sinica,2008,37(7):1342-1345(in Chinese).
    [9]
    XIAO R,ZHOU P,HOU J,et al.Effect of partial coherence of laser has on the irradiance distribution of coherent combining of fiber laser arrays in far field[J].Acta Physica Sinica,2007,56(2):819-823(in Chinese).

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