Analysis of Volume Holographic Gratings With Statistical Distribution

ABSTRACT For simulating the actual diffraction characteristics of the volume holographic grating (VHG), this paper incorporates multiple periodic gratings into the finite element method (FEM) analysis. The grating periods and refractive index modulation are modeled according to statistical distribution. Thus, the refractive index distribution within the gratings is reconstructed through the Fourier expansion. Utilizing the enhanced model, a quantitative analysis was performed to examine the relationships among model parameters, in relation to the diffraction characteristics. The results demonstrated that the optimized model achieves a correlation degree R 2 of 98% with experimental data. This model also provided a reliable theoretical basis for the precise design of optical systems based on VHGs.