Accession Number : ADP008645

Title :   Multichannel Bragg Cells for Optical Computing Applications,

Corporate Author : PHOTONIC SYSTEMS INC MELBOURNE FL

Personal Author(s) : Pape, Dennis R.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Acousto-optic Bragg cell devices currently provide the most effective way of imparting electrical information in real-time onto a light beam. Multichannel Bragg cells, with individually addressable electrodes on the same transducer substrate, extend the power of optical processing in a compact package to optical computing applications such as two-dimensional optical switching and matrix-vector processing. The design of the cell, with the placement of multiple electrodes in close proximity on a common acoustic substrate, is constrained by crosstalk and thermal requirements not found in the design of a single-channel device. These constraints arise from the desire to place the electrodes as close as possible to maximize spatial duty cycle without creating unacceptable adjacent channel crosstalk and optical beam distortion. In this paper we discuss multichannel Bragg cell design principles and the use of RF stripline techniques and acoustically anisotropic acousto-optic materials with high thermal conductivity to achieve high multichannel cell performance.

Descriptors :   *ACOUSTOOPTICS, *OPTICAL PROCESSING, *MULTICHANNEL, REAL TIME, ANISOTROPY, GALLIUM PHOSPHIDES.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE