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相位型光寻址空间光调制器稳定性分析

裴丽丽 Lili Pei,黄大杰 Dajie Huang,范薇 Wei Fan

CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG（2019）

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Abstract
基于光寻址空间光调制器的等效电路仿真及稳定性测试实验,对纯相位型光寻址空间光调制器的稳定性进行分析和优化.结果 表明,光阀液晶层的电压脉冲波形会引起光寻址空间光调制器对读出光的相位调制波动,而驱动电压频率与写入光强度同时影响相位调制波动幅度及相位调制量.由实验测量得到的光寻址空间光调制器的相位改变量曲线可知:当驱动电压周期比响应时间小95％时,最大相位改变量对应的相位波动率减小为0.35％,但此时相位调制能力仅为0.8λ;通过优化光寻址空间光调制器驱动条件参数,可获得1λ的相位调制能力,同时最大相位改变量对应的相位波动率为1％.
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Key words
optical devices, spatial light modulator, voltage waveform, vertical polarization, phase fluctuation
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