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HAN Wei, ZHONG Wei, LI Fu-quan, XIANG Yong, WANG Li-quan, LI Ke-yu, JIA Huai-ting, FENG Bin. Influence of fundamental pulse shape on third-harmonic generation[J]. LASER TECHNOLOGY, 2008, 32(5): 471-473,557.
Citation: HAN Wei, ZHONG Wei, LI Fu-quan, XIANG Yong, WANG Li-quan, LI Ke-yu, JIA Huai-ting, FENG Bin. Influence of fundamental pulse shape on third-harmonic generation[J]. LASER TECHNOLOGY, 2008, 32(5): 471-473,557.
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Influence of fundamental pulse shape on third-harmonic generation

  • Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

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  • Received Date: April 28, 2007
  • Revised Date: July 03, 2007
  • Published Date: October 24, 2008
    Graphical Abstract
    • Abstract
  • In order to achieve stable and high conversion efficiency,the influence of fundamental pulse shape on third-harmonic generation was analyzed and different physical insights of third-harmonic conversion with flat-top pulse and Gaussian pulse were studied respectively.In the case of Gaussian fundamental pulse and 3GW/cm2 input intensity,the calculated optimal second-harmonic conversion efficiency was 56.8%,lower than 66.7% predicated in theory.Furthermore,the dependence of optimal second-harmonic conversion efficiency on fundamental pulse shape was calculated under different input intensity.The spatial walk-off effect will influence the optimal second-harmonic conversion efficiency,lowering it to 62% in the case of fundamental pulse with flat-top spatial and temporal distribution.The optimal second-harmonic conversion efficiency will decrease to 51% when the spatial distribution of fundamental pulse is Gaussian.It is discovered that when the fundamental pulse is not ideal flat-top pulse shape,the third-harmonic conversion efficiency can be improved by lowering the second-harmonic conversion efficiency properly.
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    • References (10)
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