The effect of temperature on a wide-angle paratellurite acousto-optic tunable filter is analyzed on the example of two different acousto-optic tunable filter configurations. The acousto-optic tunable filter operation was between -50°C to +40°C; also the survival of an acousto-optic tunable filter device at -130°C was demonstrated. The phase matching ultrasound frequency varies with temperature. We link this temperature shift to photoelastic characteristics of the TeO_{{2}}. A generalization is made for all wide-angle acousto-optic tunable filters based on TeO_{{2}} crystal. In addition, the temperature influence on the acoustic walk off angle was examined.
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