J4 ›› 2009, Vol. 26 ›› Issue (5): 619-623.

• 非线性光学 • 上一篇    下一篇

高阶空间电荷场对匹配高斯光束自偏转特性的影响

姜其畅 苏艳丽 吉选芒 谢世杰   

  1. 山西运城学院物理与电子工程系, 运城 044000
  • 出版日期:2009-09-28 发布日期:2009-08-27
  • 通讯作者: 姜其畅(1980- )山西运城学院物理与电子工程系讲师,硕士,主要从事全固态激光器件及非线性光学研究。 E-mail:jiangsir009@163.com.

Higher-order space-charge field effects on the self-deflection of matching Gauss beam

JIANG Qi-Chang, SU Yan-Li, JI Xuan-Mang, XIE Shi-Jie   

  1. Department of Physics and Electronics Engineering Yuncheng University Shanxi, Yuncheng 044000, China
  • Published:2009-09-28 Online:2009-08-27

摘要:

通过数值模拟的方法,研究了高阶空间电荷场对匹配高斯光束在光伏光折变晶体中自偏转特性的影响。结果表明,对于给定的与晶体参量匹配的高斯光束,高阶空间电荷场对其自偏转特性的影响与外电场和光伏场的极性和强度,以及入射光束的强度有关。当外电场、光伏场、入射光束的强度取不同的参数组合时,就可以控制高斯光束的偏转程度,在三者特定的参数组合下,还可以实现高斯光束偏转方向的改变,进而实现高斯光束的无偏转稳定传播。

关键词: 非线性光学, 光折变效应, 高斯光束, 高阶空间电荷场, 自偏转

Abstract:

Higher-order space-charge field effect on the self-deflection of a Gaussian beam is numerically investigated. The resulted obtained indicates that, for a given photovoltaic-photorefractive crystal and a Gaussian beam which matches with its parameters, the effects of the higher-order space-charge field on self-deflection of Gauss beam is depend on the polarity and strength of the two field, extra electric field and photovoltaic field, and on the incident optical intensity. When the extra electric field and photovoltaic field and incident optical intensity have different combination, and obtained different self-deflection, respectively. At an especially combination, obtained the change of deflection direction of Gauss beam, and that obtained stability transmit of Gauss beam without deflection.

Key words: nonlinear optics, photorefractive effect, Gauss beam, Higher-order space-charge field, self-deflection