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Diffraction modulation evolution from a knife-edge for small-scale self-focusing

机译：刀锋衍射调制演变为小规模自聚焦

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摘要

Small-scale self-focusing is mostly caused by spatial diffraction modulation. It is the major factor for degradation of the laser pulse quality and the maximum output power. We investigate diffraction modulation evolution from a knife-edge for small-scale self-focusing through numerical calculation and experiment. We find that the effect of diffraction modulation weakens and the effect of small-scale self-focusing strengthens with the decrease of the truncation parameter. As the truncation parameter decreased continually, the effect of small-scale self-focusing strengthens sequentially,the laser begins split. In addition, the position of new growth for small-scale self-focusing is increasingly far away from the diffraction modulation peak and the diffraction fringes are broadened with the increment of the propagation distance. Our experimental results are in good agreement with an approximate theoretical analysis.
机译：小型自聚焦主要是由空间衍射调制引起的。这是降低激光脉冲质量和最大输出功率的主要因素。我们通过数值计算和实验研究了从刀刃进行小规模自聚焦的衍射调制演变。我们发现，随着截断参数的减小，衍射调制的效果减弱，小规模自聚焦的效果增强。随着截断参数的不断减小，小规模自聚焦的效果逐渐增强，激光开始分裂。另外，用于小规模自聚焦的新生长位置越来越远离衍射调制峰值，并且随着传播距离的增加衍射条纹变宽。我们的实验结果与近似理论分析非常吻合。

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  • 来源
    《Optical and quantum electronics》 |2015年第8期|2697-2707|共11页
  • 作者

    Nian Wang; Chao Tan; Xiquan Fu;

  • 作者单位

    Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China;

    Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China;

    Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Small-scale self-focusing; Knife-edge; Diffraction modulation; Nonlinear effect;

    机译：小规模自我聚焦;刀边;衍射调制;非线性效应;

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