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Deployment of a spatial light modulator-based beam-shaping system on the OMEGA EP laser

机译:在OMEGA EP激光器上部署基于空间光调制器的光束整形系统

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摘要

A beam-shaping system, based on a liquid-crystal-on-silicon spatial light modulator, has been deployed on two of the long-pulse UV beamlines of the OMEGA EP laser. Simultaneous control of both amplitude and phase with a single spatial light modulator is possible by encoding intensity information on a high-frequency carrier phase, which is subsequently removed by a low-pass spatial filter. The beam-shaping system has been integrated into operations of the existing front-end laser source and has demonstrated improved beam uniformity at multiple points in the laser. The system operates in closed loop to optimize the input infrared beam's spatial-amplitude profile prior to amplification and frequency conversion. Measured amplified beam profiles from near-field cameras along the laser beam's path are used to specify the desired input infrared beam shape. The system is used to correct local hot spots in the input beam profile and to refine the amplifier gain precompensation profile that is applied to the input beam with separate static apodizers. At present, the beam-shaping system is used only to correct amplitude variations in the beam profile, but future use may also utilize the system's capability to apply wavefront corrections to the beam.
机译:基于硅基液晶空间光调制器的光束整形系统已部署在OMEGA EP激光器的两条长脉冲UV光束线上。通过在高频载波相位上编码强度信息,可以使用单个空间光调制器同时控制幅度和相位,然后通过低通空间滤波器将其删除。光束整形系统已集成到现有前端激光源的操作中,并已证明在激光器的多个点上光束均一性得到了改善。该系统以闭环方式运行,以在放大和频率转换之前优化输入红外光束的空间-振幅轮廓。从近场摄像机沿着激光束路径测得的放大光束轮廓用于指定所需的输入红外光束形状。该系统用于校正输入光束轮廓中的局部热点,并完善通过单独的静态切趾器应用于输入光束的放大器增益预补偿轮廓。目前,光束整形系统仅用于校正光束轮廓中的幅度变化,但是将来的使用可能还会利用该系统的功能来对光束进行波前校正。

著录项

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

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

    Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299;

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

    Fusion lasers; laser beam shaping; spatial light modulator; liquid crystal devices; apodization;

    机译:融合激光器;激光束整形;空间光调制器;液晶装置;切趾;

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