Finite element method for dynamics of volume hologram with any light modulation

Dashan Li; Liren Liu; De'an Liu; Aimin Yan; Nan Xu

doi:10.1117/12.612716

7 October 2005 Finite element method for dynamics of volume hologram with any light modulation

Dashan Li, Liren Liu, De'an Liu, Aimin Yan, Nan Xu

Proceedings Volume 5911, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI; 59111B (2005) https://doi.org/10.1117/12.612716
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Volume hologram formation in photorefractive materials is a dynamic process which is generally analyzed by using material equations by Kukhtarev et al. and coupled-wave equations. Usual numerical solutions to material equations are based on layered photorefractive materials always using the Runge-Kutta method. We present a new way based on finite element method for photorefractive effect simulation with any light modulation. In this paper material equations are partially decoupled to two equations between the electron density and the electrostatic field (and hence modulate the refractive index via the electro-optic effect). Then these two equations are numerically solved by finite element method for a sinusoidal intensity pattern with an arbitrary modulation depth from the interference of two mutually coherent beams. The numerical solutions allow us to examine the validity of analytical theories for photorefractive effect. We can obtain time-space distribution of photorefractive grating, and the space-charge field buildup. We present results of a number of parameters. These solutions help to understand the dynamics of volume hologram formation in photorefractive materials.

Citation Download Citation

Dashan Li, Liren Liu, De'an Liu, Aimin Yan, and Nan Xu "Finite element method for dynamics of volume hologram with any light modulation", Proc. SPIE 5911, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI, 59111B (7 October 2005); https://doi.org/10.1117/12.612716

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