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Proceedings Paper

Radiation-induced bandwidth responses in acousto-optic Bragg cells
Author(s): Edward W. Taylor; S. P. Chapman; Michael A. Kelly; Anthony D. Sanchez; Jonathan Stohs; E. Kinsley; Douglas M. Craig
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Paper Abstract

Experimental data of the first observed radiation-induced transient changes to the bandwidth responses of an acouso-optic (AO) Bragg device is reported. A brief description is presented of a procedure for measuring radiation-induced transient changes to the first-order diffracted beam and the zero-order transmitted beam to determine the diffraction efficiencies of PbMoO4, TeO2, and GaP AO deflectors and modulators. A brief analysis of the effects of radiation-induced color centers and heating effects in a PbMoO4 AO Bragg device is presented. It was determined that a significant portion of the changes to the PbMoO4 swept frequency reponses were due to radiation-induced heating, and that radiation-induced color center effects played a secondary role. Changes to the PbMoO4 diffraction efficiency were induced by CO2 laser heating of the PbMoO4 crystal. The laser-induced changes correlated highly with electron-induced changes indicating alteration of the acoustic diffraction grating which resulted in changes to the bandwidth and bandshape responses. The presence of thermally induced spatial index gradients across the acousto-optic interaction region are believed responsible for these changes.

Paper Details

Date Published: 30 May 1995
PDF: 12 pages
Proc. SPIE 2482, Photonics for Space Environments III, (30 May 1995); doi: 10.1117/12.210532
Show Author Affiliations
Edward W. Taylor, AFMC Phillips Lab. (United States)
S. P. Chapman, AFMC Phillips Lab. (United States)
Michael A. Kelly, AFMC Phillips Lab. (United States)
Anthony D. Sanchez, AFMC Phillips Lab. (United States)
Jonathan Stohs, AFMC Phillips Lab. (United States)
E. Kinsley, AFMC Phillips Lab. (United States)
Douglas M. Craig, AFMC Phillips Lab. (United States)

Published in SPIE Proceedings Vol. 2482:
Photonics for Space Environments III
Edward W. Taylor, Editor(s)

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