Abstract
In Part I of this paper [J. Opt. Soc. Am. B31, 2638 (201410.1364/JOSAB.31.002638JOBPDE0740-3224)], an absorption model is used to predict the dye concentration and light intensity distribution inside a photopolymer medium volume. These results are now used as inputs to a Runge–Kutta algorithm acting as a subgrid of the finite-difference time-domain (FDTD) method. In this way, a full 3D time-dependent nonlocal photopolymerization driven diffusion model is implemented. This enables a more accurate and physical description of the evolutions of the holographic grating. The validity of the proposed model is examined by applying it to fit experimental data for acrylamide/polyvinyl alcohol photopolymer material layers containing the photosensitizer erythrosine B. Material parameter values are estimated by numerically fitting the experimentally obtained refractive index modulation growth curves and angular scans.
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