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Proceedings Paper

Crosstalk Characteristics Of Multichannel Acousto-Optic Bragg Cells
Author(s): Shih-Chun Lin
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Paper Abstract

A detailed characterization of crosstalk was carried out for two 32-channel. Te02 Bragg cells: one operated at 95 MHz, the other at 400 MHz. A survey showed that the two cells were state-of-the-art devices. Crosstalk was visualized and measured radiometrically in a Schlieren imaging setup. Both qualitative and quantitative results were obtained. Results showed that, when neighboring channels were activated, acoustic crosstalk due to beam spreading was the major source, especially when all the channels are driven by coherent rf signals. Acoustic crosstalk varies from zero at the transducer to about 10 dB below the maximum beam intensity. Radio frequency crosstalk was also measured. It amounted to -25 dB in the 95-MHz cell and -35 dB in the 400-MHz cell. Possible methods of further reducing the crosstalk were given and suggestions for future work were made.

Paper Details

Date Published: 22 August 1988
PDF: 9 pages
Proc. SPIE 0936, Advances in Optical Information Processing III, (22 August 1988); doi: 10.1117/12.946922
Show Author Affiliations
Shih-Chun Lin, The Aerospace Corporation (United States)

Published in SPIE Proceedings Vol. 0936:
Advances in Optical Information Processing III
Dennis R. Pape, Editor(s)

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