光学元件低频位相噪声的空间尺度
Scale length of optics low-frequency phase aberration
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摘要: 建立求位相分布空间尺度的数学模型并计算了实际钕玻璃放大片所产生位相噪声的空间尺度。且就空间尺度对焦斑的影响及其在传输过程中的变化进行了数值模拟，结果表明：空间尺度对聚焦焦斑影响很小；在传输过程中，位相噪声的空间尺度会增大，而这种增长会增强变形镜等光束质量控制手段的效果。Abstract: The scale length is an important parameter of the low-frequency phase aberration. The mathematics model to get t he scale lengths of the phase aberration caused by rectangular optics is established and the scale lengths of some Nd-glass amplifiers are calculated. And the characteristic values of slab-amplifiers are got. The relationship between the scale length and the spot size is studied. The change of the scale length in propagation is also analyzed.
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Key words:
- low-frequency phase aberration /
- scale length /
- random phase screen /
- rms phase gradient
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