Abstract

Criteria for optimal implementation of the volume holographic interconnections utilizing photorefractive materials are presented. To study the photorefractive recording mechanism which yields optimal implementation of the volume holographic interconnections, the Kukhtarev's nonlinear differential equations are resolved into a number of algebraic equations by expanding the electric field and free-carrier density into their complex Fourier series. Analytic solutions of the steady state spacecharge fields in photorefractive materials are derived for small light intensity at large modulation depth. Numerical solutions for the photorefractive crystal BSO are also obtained by utilizing Powell's method without the assumption of small laser intensity, and they are compared with the analytic solutions in both cases of stationary light interference patterns and moving light interference patterns. The intermode space-charge fields generated by a pair of light interference patterns in photorefractive materials, which may cause the second-order crosstalk problem, are described. The data regions are obtained in which the effects of intermode space-charge fields are suppressed and the criteria for optimal implementation of volume holographic interconnections are satisfied.

© 1989 Optical Society of America