High-sensitivity ultrasonic phase-shifted fiber Bragg grating balanced sensing system

• Published in: Optics express Vol. 20; no. 27; pp. 28353 - 28362
• Main Authors: Wu, Qi, Okabe, Yoji
• Format: Journal Article
• Language: English
• Published: United States 17.12.2012
• Subjects: Equipment Design; Equipment Failure Analysis; Photoacoustic Techniques - instrumentation; Refractometry - instrumentation; Transducers; Ultrasonics - instrumentation

A high-sensitivity ultrasonic sensing system is proposed and demonstrated. In this system, a phase-shifted fiber Bragg grating (PS-FBG) is used as a sensor to achieve broadband and highly sensitive detection. The PS-FBG modulates the output of a tunable laser to detect the ultrasonic strain directly...