Transient multiwave mixing and diffraction with nonsinusoidal intensity-dependent index grating in a nonlinear medium

Abstract

We study the effects of an intensity dependence in the nonlinear index change coefficient on transient and steady-state optical wave mixing and self-diffractions, using the temperature-dependent thermal index change of a nematic liquid crystal as a model material. We show that the nonsinusoidal index grating created by a sinusoidal optical intensity grating has significant influence on the phases and amplitudes of the multiwave mixing processes. Experimental results on the intensity distribution of the multiorder diffractions in a nematic liquid-crystal film near the phase transition temperature are also presented to illustrate the basic effects.

© 1997 Optical Society of America

Theory and experiments on stationary degenerate and nearly degenerate optical wave mixing and ring oscillation in a Kerr-like medium

I. C. Khoo, Wei Wang, F. Simoni, G. Cipparrone, and D. Duca
J. Opt. Soc. Am. B 8(7) 1433-1441 (1991)

Low-power (10.6-μm) laser-beam amplification by thermal-grating-mediated degenerate four-wave mixing in a nematic liquid-crystal film

I. C. Khoo, P. Y. Yan, G. M. Finn, T. H. Liu, and R. R. Michael
J. Opt. Soc. Am. B 5(2) 202-206 (1988)

Multiwave-mixing-mediated optical bandpass filter with a thin Kerr medium

Rose W. Wang and I. C. Khoo
J. Opt. Soc. Am. B 9(11) 2088-2093 (1992)

Origin of temperature-dependent diffraction efficiency in self-enhanced readout from thermally fixed gratings in photorefractive barium titanate

Yasuo Tomita and Shun-suke Matsushima
J. Opt. Soc. Am. B 14(11) 2877-2884 (1997)

Dipolar holographic gratings induced by the photorefractive process in potassium lithium tantalate niobate at the paraelectric phase

Aharon J. Agranat, Meir Razvag, Michal Balberg, and Victor Leyva
J. Opt. Soc. Am. B 14(8) 2043-2048 (1997)