基于液晶光波导的电控偏振旋转器

查正桃; 张谦述

doi:10.37188/CO.2021-0213

Volume 15 Issue 3

May 2022

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Chinese Optics > 2022 > 15(3): 552-561.

ZHA Zheng-tao, ZHANG Qian-shu. Electrically controlled polarization rotator based on liquid crystal optical waveguide[J]. Chinese Optics, 2022, 15(3): 552-561. doi: 10.37188/CO.2021-0213

Citation:

ZHA Zheng-tao, ZHANG Qian-shu. Electrically controlled polarization rotator based on liquid crystal optical waveguide[J]. Chinese Optics, 2022, 15(3): 552-561. doi: 10.37188/CO.2021-0213

ZHA Zheng-tao, ZHANG Qian-shu. Electrically controlled polarization rotator based on liquid crystal optical waveguide[J]. Chinese Optics, 2022, 15(3): 552-561. doi: 10.37188/CO.2021-0213

Citation:

ZHA Zheng-tao, ZHANG Qian-shu. Electrically controlled polarization rotator based on liquid crystal optical waveguide[J]. Chinese Optics, 2022, 15(3): 552-561. doi: 10.37188/CO.2021-0213

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Electrically controlled polarization rotator based on liquid crystal optical waveguide

doi: 10.37188/CO.2021-0213

ZHA Zheng-tao^{1, 2
,},
ZHANG Qian-shu^{2
,
,}

1.
School of Physics and Astronomy, China West Normal University, Nanchong 637009, China
2.
School of Electronic Information Engineering, China West Normal University, Nanchong 637009, China

Funds: Supported by the Scientific Research Foundation of the Science and Technology Department of Sichuan Province, China (No. 2014JY0024); the Scientific Research Foundation of the Science and Technology Bureau of Nanchong, China (No. 19YFZJ0090); the Talent Scientific Research Foundation of China West Normal University Foundation, China (No. 17YC056)

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Corresponding author: jackyzhang@cwnu.edu.cn
Received Date: 06 Dec 2021
Rev Recd Date: 22 Dec 2021
Accepted Date: 21 Jan 2022

Available Online: 27 Jan 2022

Publish Date: 20 May 2022

Abstract

Abstract

In this study, the gradient characteristic of field-induced reorientation of nematic liquid crystal was investigated to accurately analyze the Polarization Conversion Length (PCL) and Polarization Conversion Efficiency (PCE) of an electronically controlled polarization rotator based on a liquid crystal optical waveguide. Firstly, according to the eigenvalue equation obtained from the liquid crystal magnetic field coupling equations, the corresponding relationship between PCL and the applied voltage was constructed. Then, the explicit expression of the iterative equations of the Alternating Direction Implicit Beam Propagation Method (ADI-BPM) was obtained by transverse finite-difference discretization of the electric field transmission equation, which was used to solve the propagation field in the liquid crystal optical waveguide and calculate the PCE. Finally, the eigenmode and propagation field were solved through a simulation experiment, and then the effects of the gradient characteristics of the liquid crystal director on PCL and PCE were analyzed. The results show that the effect of the gradient of the liquid crystal director on the PCL can be ignored, but the maximum PCE is about 20% lower than that of the uniform reorientation of the liquid crystal. This result will provide a certain theoretical reference for the practical development of an electronically controlled polarization rotator based on a liquid crystal optical waveguide.
- liquid crystal,
- optical waveguide,
- polarization rotator,
- electric tuning

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References(31)

References

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