Characterization of Temperature Field Distribution in Large-Size Paratellurite Crystals Applied in Acousto-Optic Devices

Abstract

Temporal and spatial distribution of temperature eld was studied in operating acousto-optic devices on base of large-size paratellurite crystals. The study was carried out in real time by means of thermal imaging technique. Dynamics of heat release in a hot deector and a hot tunable lter was examined at dierent frequencies and driving electric power levels applied to piezoelectric transducers. The study was also based on measurements of standing wave ratio and analysis of the Smith charts.

Thermal analysis of TeO2-based acousto-optic tunable filters for spectral imaging

“…However, the temperature located in the crystal is difficult to obtain. So far, the laser ultrasonic temperature mapping technique, laser condensation, and the thermal imaging technique have all been used to analyze the temperature distribution of devices [15][16][17]. However, the majority of these methods can only obtain the approximate temperature distribution on the crystal surface, Alternatively, obtain the integration result of the threedimensional temperature field in a certain direction.…”