对于无吸收的光栅，参考光束相对物光束越宽，衍射效率将越高。

The results show that diffraction efficiency of a lossless grating increases with the higher ratio of reference beam width to object beam width.

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采用低压驱动电路驱动压电陶瓷相移器对参考光束进行相移，从而使仪器质量减轻、体积缩小、成本降低。

The low-voltage driving circuit is adopted to drive a piezoelectric ceramic phase shifter to shift the phase of the reference beam, so as to make the instrument lighter, smaller and cheaper.

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对宽带倍频光的光束匀滑及聚焦特性的研究，可为实现靶面均匀辐照提供参考。

The study on the beam smoothing and the focusing properties of the broadband harmonic field can provide valuable reference to the experiment.

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