Abstract

The new experimental data on the dynamics of diffraction efficiency (DE) of superimposed volume reflection holograms with a grating period of \({\sim}\)250 nm is obtained at their simultaneous recording in the photopolymer material BAYFOL HX TP. The character and parameters of their interaction are established when exposure of one hologram is delayed relative to the other one. It is revealed that the DE dynamics is practically not affected by variations in diffusion time of monomer in the range \(0.12<t_{D}<0.17\) s, but the transient behavior of the photopolymerization parameter \(\tau_{p}\), which increased in our experiments from 5 to 15 s, becomes considerably visible. The well-known equations of the photoinduced variation in the photopolymer refraction index are improved with account for the character of variation in the parameter \(\tau_{p}\). The calculated dependences of DE dynamics obtained with refined formulas are in good agreement with experimental data (mean square deviation is \({\sim}2\%\)).

中文翻译：

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叠加体积反射全息图同时记录在光敏高分子材料中的衍射效率动力学

摘要

在将其同时记录在光聚合物材料BAYFOL HX TP中的同时，获得了光栅周期为\（{\ sim} \） 250 nm的体反射全息图的衍射效率（DE）动力学的新实验数据。当一张全息图的曝光相对于另一张全息图的曝光延迟时，即可确定其相互作用的特性和参数。揭示了DE动力学实际上不受单体扩散时间在\（0.12 <t_ {D} <0.17 \） s范围内变化的影响，而是光聚合参数\（\ tau_ {p}的瞬态行为\）在我们的实验中从5秒增加到15秒，变得非常明显。考虑到参数\（\ tau_ {p} \）的变化特性，改进了光聚合物折射率的光致变化的众所周知的方程式。用精制公式获得的DE动力学的计算依赖性与实验数据非常吻合（均方差为\（{\ sim} 2 \％\））。