@inproceedings{c3c18e7df7594a3db2191fd37b8cfcb2,
title = "Acoustic emission monitoring using two-wave mixing interferometer",
abstract = "An optical fiber Bragg grating (FBGs) based sensor system designed for the local detection of acoustic emissions (AE) in engineering structures is presented. The system uses an array of surface mounted FBG sensors, each with a spectral reflectivity in the C-band. The sensor responds to the local dynamic strain caused by propagating acoustic emissions by a shift in its spectral reflectivity spectrum, which is monitored with a two-wave mixing photorefractive interferometer based spectral demodulator. In this work, we present the results detailing the detection of high frequency AE responses on a metallic plate, specifically focusing on the FBG sensor sensitivity to the AE propagation distance. The frequency response of the sensor system to AE signals induced by pencil-lead breaks is evaluated.",
keywords = "Acoustic emission monitoring, Fiber Bragg grating, Interferometer, Photorefractive",
author = "Y. Zhu and O. Balogun and S. Krishnaswamy",
note = "Funding Information: We thank the Intermountain Region of the USDA Forest Service for financial support to conduct this assessment. We are grateful to employees of the Intermountain Region{\textquoteright}s Regional Office for their insights and particularly Mark Bethke for his oversight and support of the project, and Jeff Bruggink, Gina Lampman, Mark Muir, and Cynthia Tait for assistance in identifying goals, process, reviews, and points of contact on the Salmon-Challis National Forest. We appreciate the Salmon-Challis staff, including Bart Gammet, Dave Deschaine, Jeremy Back, and Josh Milligan, for supplying data, assisting site visits, and reviewing early drafts of this report. David Hawksworth provided research and editorial assistance. Funding Information: We thank the Intermountain Region of the USDA Forest Service for financial support to conduct this assessment. We are grateful to employees of the Intermountain Region?s Regional Office for their insights and particularly Mark Bethke for his oversight and support of the project, and Jeff Bruggink, Gina Lampman, Mark Muir, and Cynthia Tait for assistance in identifying goals, process, reviews, and points of contact on the Salmon-Challis National Forest. We appreciate the Salmon-Challis staff, including Bart Gammet, Dave Deschaine, Jeremy Back, and Josh Milligan, for supplying data, assisting site visits, and reviewing early drafts of this report. David Hawksworth provided research and editorial assistance.; 36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE ; Conference date: 26-07-2009 Through 31-07-2009",
year = "2010",
doi = "10.1063/1.3362301",
language = "English (US)",
isbn = "9780735407480",
series = "AIP Conference Proceedings",
pages = "1807--1811",
booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",
}