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Optical Engineering

Numerical simulation of double random phase encoding
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Paper Abstract

In this paper, we propose a method for the numerical simulation of optical double random phase encoding (DRPE). This method is based on a discrete model of the DRPE system that retains the properties of its optical counterpart and takes into account the capacity of DRPE to spread a signal’s energy in both the space and the spatial frequency domains. Discrete versions of two narrowband lossless diffusers are created to simulate their analogue optical counterparts and their bandwidths control how much the energy of the input signal is spread in both the space and spatial frequency domains as it passes through the system. The limiting case, when complete aliasing (maximum overlap) takes place, is also discussed in relation to our method. In this case, we show our method reduces to a purely numerical encryption procedure which can, nonetheless, be decrypted perfectly. Simulation results are presented to demonstrate the feasibility of the proposed technique.

Paper Details

Date Published: 18 December 2012
PDF: 11 pages
Opt. Eng. 51(12) 128201 doi: 10.1117/1.OE.51.12.128201
Published in: Optical Engineering Volume 51, Issue 12
Show Author Affiliations
Shi Liu, Univ. College Dublin (Ireland)
Bryan M. Hennelly, National Univ. of Ireland, Maynooth (Ireland)
John T. Sheridan, Univ. College Dublin (Ireland)

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