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相位型光寻址空间光调制器稳定性分析

Stability Analysis for Optically-Addressed Phase-Only Spatial Light Modulator

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摘要

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%。

Abstract

The working stability of an optically-addressed phase-only spatial light modulator is analyzed and optimized based on the equivalent circuit simulation of the optically-addressed spatial light modulator and an experiment to measure its stability. The results demonstrate that the voltage waveform on the liquid crystal layer of the light valve causes the phase fluctuation of the readout light modulated by the optically-addressed spatial light modulator and that the driving voltage frequency and write light intensity simultaneously affect the modulator''s phase fluctuation amplitude and phase change capability. Based on the aforementioned analysis and by testing the phase change curves of the optically-addressed spatial light modulator, it is found that when the driving voltage period is 95% less than the response time, the phase fluctuation rate corresponding to the maximum phase change of the phase modulation curve is reduced to 0.35%; however, the phase modulation capability is only 0.8λ. By optimizing the driving condition parameters of the optically-addressed spatial light modulator, a phase modulation capability of 1λ is obtained, and the phase fluctuation rate corresponding to the maximum phase change of the phase modulation curve is 1%.

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DOI:10.3788/CJL201946.0801002

所属栏目:激光器件与激光物理

收稿日期:2019-03-07

修改稿日期:2019-04-08

网络出版日期:2019-08-01

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裴丽丽:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800中国科学院大学材料与光电研究中心, 北京 100049
黄大杰:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800
范薇:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800中国科学院大学材料与光电研究中心, 北京 100049

联系人作者:黄大杰(hdajie@siom.ac.cn)

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引用该论文

Lili Pei, Dajie Huang, Wei Fan. Stability Analysis for Optically-Addressed Phase-Only Spatial Light Modulator[J]. Chinese Journal of Lasers, 2019, 46(8): 0801002

裴丽丽, 黄大杰, 范薇. 相位型光寻址空间光调制器稳定性分析[J]. 中国激光, 2019, 46(8): 0801002

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