Temperature Insensitive Fiber Optic Sensor for Acoustic Wave Detection

Ultrasonic detection of surface acoustic waves has been shown to have important applications in determining microstructural properties, inspection of materials for quality control and for detection of flaws in materials. Several laser generated optical techniques have been shown to be highly sensitive for the detection of ultrasound [1]. However, light transmission through air has several problems and fiber optic sensors are rapidly gaining popularity because of their high sensitivity, small size and low transmission losses