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Acousto-Optic Tunable Filters for Imaging Applications in the 2-4~μm with Low RF Drive Power

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Valle S., Ward J., Pannell C., Johnson N.
Acta Physica Polonica A
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2015
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vol. 127
|
issue 1
58-59
EN
The λ^{2} dependence on acoustic field intensity (and hence RF drive power) can render large aperture acousto-optic tunable filters impractical for many applications beyond about 2 μm. One potential technique for reducing the RF drive-power requirement is to configure an acousto-optic tunable filter such that the interaction region is at acoustic resonance. We describe an acousto-optic tunable filter that operates at resonance and present an analysis of the predicted performance. In addition, we address the practical issues in deploying such a scheme. Finally, we present results of a prototype "resonant acousto-optic tunable filter" operating in the 1-2 μm region.
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