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Image processing and control of a programmable spatial light modulator for spatial beam shaping

机译：用于空间光束整形的可编程空间光调制器的图像处理和控制

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摘要

Programmable spatial shapers using liquid-crystal-based spatial-light-modulators in the National Ignition Facility lasers enable spatial shaping of the beam profile so that power delivered to the target can be maximized while maintaining system longevity. Programmable spatial shapers achieve three objectives: Introduce obscurations shadowing isolated flaws on downstream optical elements that could otherwise be affected by high fluence laser illumination; Spatial shaping to reduce beam peak-to-mean fluence variations to allow the laser to operate at higher powers so that maximum power can be delivered to the target; And finally gradually exposing the optical regions that have never seen laser light because they have always had shadowing from a blocker that is no longer needed. In this paper, we describe the control and image processing algorithms that determine beam shaping and verification of the beam profile. Calibration and transmittance mapping essential elements of controlling the PSS are described along with spatially nonlinear response of the device such as scale and rotation.
机译：在国家点火装置激光器中使用基于液晶的空间光调制器的可编程空间整形器可以对光束轮廓进行空间整形，从而可以在保持系统寿命的同时最大化传递至目标的功率。可编程的空间整形器可实现三个目标：在下游光学元件上引入遮盖阴影，以隔离孤立的缺陷，否则这些缺陷可能会受到高通量激光照射的影响；空间整形可减少光束的峰均能量密度变化，从而使激光器能够以更高的功率工作，从而可以将最大功率传递到目标；最后，逐渐暴露出从未见过激光的光学区域，因为它们一直受到来自不再需要的阻挡器的遮挡。在本文中，我们描述了确定光束成形和光束轮廓验证的控制和图像处理算法。描述了控制PSS的校准和透射率映射的基本元素，以及设备的空间非线性响应（例如缩放和旋转）。

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  • 来源
    《High power lasers for fusion research II》|2013年|86020A.1-86020A.12|共12页
  • 会议地点 San Francisco CA(US)
  • 作者

    Abdul A. S. Awwal; Charles Orth; Eddy Tse; JoAnn Matone; Mitanu Paul; Carla Hardy; Gordon Brunton; Mark Hermann; Steve Yang; J.M. DiNicola; Matt Rever; Sham Dixit; John Heebner;

  • 作者单位

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

    Integrated Computer Control System, National Ignition Facility Computer Engineering division Lawrence Livermore National Laboratory, Livermore, CA. 94551;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    control systems; laser alignment; beam shaping; liquid crystal device; spatial light modulator;

    机译：控制系统；激光对准光束整形液晶装置空间光调制器;

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