Diffraction Characteristics Analysis of Cascaded Liquid Crystal Polarization Gratings

被引：2

作者：

Wang Li'Na ^{[1
]}

Li Mingqiu ^{[1
]}

Wang Chunyang ^{[1
]}

Shi Hongwei ^{[1
]}

Niu Qifeng ^{[1
]}

机构：

[1] Changchun Univ Sci & Technol, Coll Elect & Informat Engn, Changchun 130022, Jilin, Peoples R China

来源：

LASER & OPTOELECTRONICS PROGRESS | 2020年 / 57卷 / 03期

关键词：

gratings; cascaded liquid crystal polarization gratings; beam deflection; diffraction efficiency; driving voltage; EFFICIENCY;

D O I：

10.3788/LOP57.030501

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Liquid crystal polarization grating (LCPG) can achieve non-mechanical beam steering. During the actual preparation of LCPGs, the filling of liquid crystal molecules is not uniform, resulting in uneven liquid crystal layer thickness, which reduces the diffraction efficiency of light through the same position of the effective region of cascaded LCPG. This study analyzes the influence of driving voltage on the diffraction efficiency of LCPG based on Jones matrix theory to improve the diffraction efficiency of cascaded LCPGs. An experimental device is constructed for beam deflection using a three-stage cascaded LCPGs. The spot energy is measured by applying varying driving voltages, and the relationship between the diffraction efficiency and the voltage is obtained. The experimental results show that the +1st-order diffraction efficiency reaches 0.80-0.81 when the voltage is in the range of 2. 0-2. 4 V.

引用

页数：5

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