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基于Talbot效应的可调位相差二维六角位相阵列器的理论研究和数值模拟
The theoretical study and numerical simulation of the tunable two-dimensional hexagonal phase array based on Talbot effect
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摘要: 系统研究了基于Talbot效应的光栅阵列器,利用数值模拟方法开展了阵列器的理论研究,对二维振幅型与固定位相差型阵列器进行了分析,通过外加电场调制位相差可以很好的解决二维振幅型与固定位相差型阵列器后z处光强分布不可调节和工作易受温度影响的问题.推导了外加电场调制位相差位相型阵列器实现均匀光强分布的理论模型,并验证了Paturz等人的实验结果,为此种新型阵列器的研究提供了基础.Abstract: In this paper,on the basis of Talbot effect and using numerical simulation,we analyzed the two-dimensional amplitude and fixed-phase-difference arrays and found that these arrays can easily be affected by temperature,and the intensity distribution at z position behind them can't be tuned.To solve the problem,an extemal electric fieId is used to tune the phase-difference of the phase array.We derived a theoretical model which realizes uniform distribution of light intensity via the application of an external electric field to tune the phase-difference,and the model agreed with Paturzo's experimental results.The result make a good foundation for the research of new kinds of arrays.
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