强激光系统光学元件波前相位梯度分析
RMS gradient analysis of the high power laser system components
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摘要: 介绍了在高功率固体激光系统中用于评价光学元件对光束聚焦特性影响的参数——波前相位梯度及其检测原理和计算方法，并与常用的光学元件评价参数PV值、RMS值以及新引入的评价方式——PSD进行了比较。得到了高功率激光系统中几种典型光学元件的相位梯度分析结果，结果表明利用相位梯度分析方法能够有效的对光学元件的加工质量进行评价。Abstract: To specify the component focus performance the author uses the RMS gradient so that the direct relationship of the fabrication quality and the focus performance of the laser beam can be easily found. In this paper the definition of the RMS gradient and its characteristics are introduced, the differences between the RMS gradient and the PV, RMS，PSD are discussed. The RMS gradient analyzing results of some typical components employed in the high power laser system are presented. The results show that the RMS gradient is a kind of efficient tool to specify the optical components’ fabrication quality.
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Key words:
- rms gradient /
- optical components /
- high power laser system
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