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Investigation of magnesium fluoride crystals for imaging acousto-optic tunable filter applications

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Abstract

Results of an investigation of acousto-optic (AO) cells using single crystals of magnesium fluoride (MgF2) are presented. Two acousto-optic tunable filter (AOTF) cells for imaging application have been designed and tested in the visible and ultraviolet (UV) regions of the spectrum from 190 to 490nm. The two imaging filters were developed by using the wide-angle AO interaction geometry in the (010) and (11̄0) planes of the crystal. These filters were used to obtain spectral images at the shortest wavelengths achieved so far. Advantages and drawbacks of this crystal are discussed and photoelastic, acoustic, and AO properties of MgF2 are examined. The investigation confirmed that MgF2-based AOTF cells can be used in the deep UV region up to 110nm.

© 2006 Optical Society of America

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