Laser self-mixing fiber Bragg grating sensor for acoustic emission measurement

Authors

Bin Liu, University of WollongongFollow
Yuxi Ruan, University of WollongongFollow
Yanguang Yu, University of WollongongFollow
Jiangtao Xi, University of WollongongFollow
Qinghua Guo, University of WollongongFollow
Jun Tong, University of WollongongFollow
Ginu Rajan, University of WollongongFollow

RIS ID

128612

Publication Details

B. Liu, Y. Ruan, Y. Yu, J. Xi, Q. Guo, J. Tong & G. Rajan, "Laser self-mixing fiber Bragg grating sensor for acoustic emission measurement," Sensors, vol. 18, (6) pp. 1956-1-1956-12, 2018.

Abstract

Fiber Bragg grating (FBG) is considered a good candidate for acoustic emission (AE) measurement. The sensing and measurement in traditional FBG-based AE systems are based on the variation in laser intensity induced by the Bragg wavelength shift. This paper presents a sensing system by combining self-mixing interference (SMI) in a laser diode and FBG for AE measurement, aiming to form a new compact and cost-effective sensing system. The measurement model of the overall system was derived. The performance of the presented system was investigated from both aspects of theory and experiment. The results show that the proposed system is able to measure AE events with high resolution and over a wide dynamic frequency range.