Document Type

Conference Paper

Publication Date

7-2001

Publication Source

Proceedings of SPIE: Photonic Devices and Algorithms for Computing III

Abstract

Angular and wavelength READ beam errors in holographic interconnection systems are often a recurrent problem. Several strategies have been proposed to minimize or eliminate such READOUT misalignments.

Some years ago, Chatterjee and co-workers proposed a method involving READ beam wavelength tuning to correct output angular errors. In this paper, we investigate the possibility of using an acousto-optic (A-O) Bragg cell with optoelectronic feedback to dynamically correct the scattered beam for deviations in the incidence direction of the READ beam of a hologram. The concept here is based on an acoustic frequency feedback strategy used recently by Balakshy and Kazaryan for laser beam directional stabilization.

In the dynamic and adaptive method being proposed here, an acousto-optic Bragg cell is placed between the READ beam and the hologram. A photo-detector placed after the Bragg cell enables the estimation of scattered efficiency and hence (from the READ dephasing-based diffraction efficiency), the amount of the angular deviation. An algorithm for implementing the above scheme, to be used in a practical setup, is proposed and the results of numerical simulations are presented along with possible extensions to wavelength error correction and other applications.

Inclusive pages

127-137

ISBN/ISSN

0277-786X

Document Version

Published Version

Comments

This document is provided for download in compliance with the publisher's policy on self-archiving. Permission documentation is on file.

DOI: 2001); http://dx.doi.org/10.1117/12.449651

Publisher

Society of Photo-optical Instrumentation Engineers

Volume

4470

Place of Publication

San Diego, CA

Peer Reviewed

yes