Abstract

The nonlinear differential equations describing the response of photorefractive material to a moving sinusoidal intensity pattern that permits large modulation depth are solved by a numerical technique under steady-state condition. It is found that, at large modulation, the higher harmonics of the variables (space charge field, electron density, and ionized donor density) have appreciable amplitudes that can be further enhanced by moving the fringes. It is also shown that the optimized amplitudes of the higher harmonics of the space charge field can be strong and comparable with the fundamental and that the dependence of these higher harmonics of the space charge field on the spatial frequency is much weaker at large modulation.

© 1990 Optical Society of America

Perturbative analysis of higher-order photorefractive gratings

Ragini Saxena and Tallis Y. Chang
J. Opt. Soc. Am. B 9(8) 1467-1472 (1992)

Modulation dependence of the photorefractive response with moving gratings: numerical analysis and experiment

George A. Brost, Kevin M. Magde, John J. Larkin, and Meckie T. Harris
J. Opt. Soc. Am. B 11(9) 1764-1772 (1994)

Kinetics of the higher-order response of photorefractive materials

Zhongxiang Zhou, Xiudong Sun, Yan Li, Yongyuan Jiang, Hua Zhao, Kebin Xu, and Qiuyu Wan
J. Opt. Soc. Am. B 13(11) 2580-2586 (1996)

Higher-order analysis of the photorefractive effect for large modulation depths

Ellen Ochoa, Frederick Vachss, and Lambertus Hesselink
J. Opt. Soc. Am. A 3(2) 181-187 (1986)

Nonlinear photorefractive response at high modulation depths

Frederick Vachss and Lambertus Hesselink
J. Opt. Soc. Am. A 5(5) 690-701 (1988)