Laser-ultrasonic imaging for evaluation of temperature fields in paratellurite optical crystal

The problem of internal temperature gradients is topical in design of high-performance acousto-optic devices. Current study is focused on the application of laser ultrasound method for evaluation of temperature fields in the paratellurite acousto-optic cell. An automatized laser ultrasonic structuroscope UDL-2M is used to scan the cell surface and to evaluate the temperature distribution from the time-of-fight measurements. The experimental results are presented and precision is discussed. The proposed method has the accuracy of 2–3 degrees Celsius.