Abstract
We apply the fast Fourier transform beam-propagation method (FFT-BPM) to analyze holographic data storage systems (HDSSs), and develop an image-based simulation for diffraction characteristics in a transmission-type HDSS. The FFT-BPM is known as a very effective method for the design of large waveguides. By applying this method, we can obtain a beam profile in a recording medium that consists of a three-dimensional (3D) complex refractive-index distribution, and analyze the diffraction characteristics in page-oriented multiplexing holograms for an analytic region more practical than that required for the finite-difference time-domain (FDTD) method because of much lower computation time and memory. In this study, we demonstrate angular multiplexing by recording three data pages at different angles and visualize angular selectivity for diffraction efficiency and the sharpness of reconstructed images by a 3D numerical simulation.
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