Distance detection with optical fiber extrinsic fabry-perot interference ultrasonic sensor

摘要

In this paper, we proposed an optical fiber extrinsic Fabry-Perot interferometer (EFPI) sensor for distance detection of ultrasound signal. This optical fiber EFPI sensor was fabricated with a novel and simple technics. In the experiments, both traditional piezoelectric transducer (PZT) and high voltage electrode discharge were used as the ultrasound signal source. The experimental results indicate that strong ultrasound signals can be detected by the fiber EFPI senor in both cases and the maximum detection distance in the air is more than 180cm.