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Measurement of thermal distortion in high power laser glass elements using ptychography

  • [设施]:神光Ⅱ
  • [期刊/会议名称]:Laser Physics Letters
  • [摘要]:The heat generated in the cavity of the high power slab laser amplifier makes it less stable and induces a thermal-lens effect which adds a spherical phase distribution to the wave-front of the laser beam. The commonly employed interferometry or Hartmann–Shack sensor based measurements are unable to provide an accurate measurement of the thermal distortion of the gain medium. It is demonstrated that this problem can be solved using a scheme based on ptychographical iterative engine. The complex transmittance of the outgoing laser is obtained by the proposed scheme while the amplifier is set at its turned off and turned on state and the thermal distortion caused by the pumping light is calculated from the obtained transmittance.
  • [发表日期]:2015
  • [第一作者]:H Wang
  • [第一作者单位]:上海光机所
  • [通讯作者]:H Wang
  • [通讯作者单位]:上海光机所
  • [论文类型]:null
  • [期刊分类]:SCI4区
  • [学科分类]:物理
  • [影响因子]:2.458
  • [关键词]:
  • [卷号]:12
  • [期号]:2
  • [起止页码]:025005
  • [简介]: