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Open AccessArticle

Laser Self-Mixing Fiber Bragg Grating Sensor for Acoustic Emission Measurement

School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
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Sensors 2018, 18(6), 1956; https://doi.org/10.3390/s18061956
Received: 11 May 2018 / Revised: 13 June 2018 / Accepted: 15 June 2018 / Published: 16 June 2018
(This article belongs to the Special Issue Laser Sensors for Displacement, Distance and Position)
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. View Full-Text
Keywords: laser diode; acoustic emission measurement; fiber Bragg grating; self-mixing interferometry laser diode; acoustic emission measurement; fiber Bragg grating; self-mixing interferometry
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MDPI and ACS Style

Liu, B.; Ruan, Y.; Yu, Y.; Xi, J.; Guo, Q.; Tong, J.; Rajan, G. Laser Self-Mixing Fiber Bragg Grating Sensor for Acoustic Emission Measurement. Sensors 2018, 18, 1956. https://doi.org/10.3390/s18061956

AMA Style

Liu B, Ruan Y, Yu Y, Xi J, Guo Q, Tong J, Rajan G. Laser Self-Mixing Fiber Bragg Grating Sensor for Acoustic Emission Measurement. Sensors. 2018; 18(6):1956. https://doi.org/10.3390/s18061956

Chicago/Turabian Style

Liu, Bin; Ruan, Yuxi; Yu, Yanguang; Xi, Jiangtao; Guo, Qinghua; Tong, Jun; Rajan, Ginu. 2018. "Laser Self-Mixing Fiber Bragg Grating Sensor for Acoustic Emission Measurement" Sensors 18, no. 6: 1956. https://doi.org/10.3390/s18061956

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