光折变晶体中非稳态散斑场的偏振自调制

Polarization self-modulation of the nonstationary speckle field in a photorefractive crystal.

作者信息

Kamshilin A A, Paivasaari K, Khomenko A V, Fuentes-Hernández C

机构信息

Department of Physics, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland.

出版信息

Opt Lett. 1999 Jun 15;24(12):832-4. doi: 10.1364/ol.24.000832.

DOI:10.1364/ol.24.000832

PMID:18073869

Abstract

We have observed the nonstationary polarization modulation of a speckle pattern transmitted through a photorefractive crystal under the alternating electric field of a square-wave form. A simple model based on Gaussian-beam propagation in the crystal with the diffusion type of nonlinearity is proposed to explain the main features of the experiment. Application of the phenomenon to noncontact and highly sensitive measurements of a rough surface movement is suggested.

摘要

我们观测到了在方波形式的交变电场下，通过光折变晶体传输的散斑图案的非平稳偏振调制现象。提出了一个基于高斯光束在具有扩散型非线性的晶体中传播的简单模型，以解释该实验的主要特征。还建议将该现象应用于粗糙表面运动的非接触式高灵敏度测量。