光栅波像差对脉冲压缩的影响
Effect of wavefront aberration of grating on pulse compression
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摘要: 采用光线追迹的方法，对脉冲压缩光栅系统波像差进行理论研究，构建了有像差脉冲压缩光栅对分析模型，使用该模型通过模拟计算得出了波像差对脉冲压缩效果的影响。理论分析结果表明：脉冲压缩光栅系统最大波像差不大于λ/4时，脉冲压缩比的最大变化率约为2%。脉冲压缩光栅对系统达到衍射极限时，在选择适当的入射角度时,光栅波像差所引起的脉冲压缩比变化并不大。Abstract: With ray tracing analysis method, a theoretical analysis of wavefront aberration is made in pulse compression gratings. A model made up of pulse compression grating pair with wavefront aberration is applied to calculate the effect of the wavefront aberration on pulse compression. The preliminary conclusion shows that the maximum rate of compression ratio changes is about 2% and the change rate is less when the peak-to-valley value of wavefront aberration is less than a quarter of wavelength and incident angle is properly．
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Key words:
- diffractive optical element /
- wavefront aberration /
- ray trace /
- pulse compression /
- compression ratio
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