Radiation-induced bandwidth responses in acousto-optic Bragg cells

Edward W. Taylor; S. P. Chapman; Michael A. Kelly; Anthony D. Sanchez; Jonathan Stohs; E. Kinsley; Douglas M. Craig

doi:10.1117/12.210532

30 May 1995 Radiation-induced bandwidth responses in acousto-optic Bragg cells

Edward W. Taylor, S. P. Chapman, Michael A. Kelly, Anthony D. Sanchez, Jonathan Stohs, E. Kinsley, Douglas M. Craig

Proceedings Volume 2482, Photonics for Space Environments III; (1995) https://doi.org/10.1117/12.210532
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

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.

Citation Download Citation

Edward W. Taylor, S. P. Chapman, Michael A. Kelly, Anthony D. Sanchez, Jonathan Stohs, E. Kinsley, and Douglas M. Craig "Radiation-induced bandwidth responses in acousto-optic Bragg cells", Proc. SPIE 2482, Photonics for Space Environments III, (30 May 1995); https://doi.org/10.1117/12.210532

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