Thin dynamic holograms with an asymmetric fringe profile

被引：13

作者：

Venediktov, V. Yu ^{[1
]}

机构：

[1] St. Petersburg State Electrotechnical University, St. Petersburg 197376

来源：

Optoelectronics, Instrumentation and Data Processing | 2012年 / 48卷 / 02期

关键词：

dynamic holography; liquid crystal; spatial light modulator;

D O I：

10.3103/S8756699012020033

中图分类号：

学科分类号：

摘要：

Results of an investigation and a comparison of schemes used for recording dynamic holographic gratings in a liquid-crystal spatial light modulator, which ensure grating profile asymmetrization and, thus, a significant increase in its diffraction efficiency, are presented. Three approaches are considered: digital, analog, and self-asymmetrization of the profile due to the effect of a secondary field induced in the nematic volume. It is demonstrated that the first two approaches provide recording of gratings with low spatial frequencies (several mm -1) and with an approximately equal rate of asymmetry (the potential efficiency of diffraction to the first order is 70-75%), while the third approach provides recording of gratings with a much higher spatial frequency (hundreds of mm -1), but with a lower efficiency (about 50%). © 2012 Allerton Press, Inc.

引用

页码：126 / 133

页数：7

共 15 条

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