The self-defocusing of a diffraction beam in a photorefractive crystal and its application in a Fourier plane multiple beam splitter

Abstract

We propose using a diffraction beam to induce a self-defocusing lens and applying it in a Fourier plane multiple beam splitter (FPMBS). The self-induced lens array in the FPMBS can increase the splitting ratio, which is generated by inserting a photorefractive crystal at the Rayleigh distance of the diffraction beam from each pixel. (C) 1999 Elsevier Science B.V. All rights reserved.