Sensors 2013, 13(2), 1836-1845; doi:10.3390/s130201836
Article

Distributed Temperature and Strain Discrimination with Stimulated Brillouin Scattering and Rayleigh Backscatter in an Optical Fiber

Department of Physics, University of Ottawa, Ottawa, ON K1N 6N5, Canada
* Author to whom correspondence should be addressed.
Received: 3 December 2012; in revised form: 21 January 2013 / Accepted: 28 January 2013 / Published: 31 January 2013
(This article belongs to the Section Physical Sensors)
PDF Full-text Download PDF Full-Text [502 KB, uploaded 31 January 2013 11:31 CET]
Abstract: A distributed optical fiber sensor with the capability of simultaneously measuring temperature and strain is proposed using a large effective area non-zero dispersion shifted fiber (LEAF) with sub-meter spatial resolution. The Brillouin frequency shift is measured using Brillouin optical time-domain analysis (BOTDA) with differential pulse-width pair technique, while the spectrum shift of the Rayleigh backscatter is measured using optical frequency-domain reflectometry (OFDR). These shifts are the functions of both temperature and strain, and can be used as two independent parameters for the discrimination of temperature and strain. A 92 m measurable range with the spatial resolution of 50 cm is demonstrated experimentally, and accuracies of ±1.2 °C in temperature and ±15 με in strain could be achieved.
Keywords: optical fiber sensors; temperature and strain discrimination; stimulated Brillouin scattering; Rayleigh scattering

Article Statistics

Load and display the download statistics.

Citations to this Article

Cite This Article

MDPI and ACS Style

Zhou, D.-P.; Li, W.; Chen, L.; Bao, X. Distributed Temperature and Strain Discrimination with Stimulated Brillouin Scattering and Rayleigh Backscatter in an Optical Fiber. Sensors 2013, 13, 1836-1845.

AMA Style

Zhou D-P, Li W, Chen L, Bao X. Distributed Temperature and Strain Discrimination with Stimulated Brillouin Scattering and Rayleigh Backscatter in an Optical Fiber. Sensors. 2013; 13(2):1836-1845.

Chicago/Turabian Style

Zhou, Da-Peng; Li, Wenhai; Chen, Liang; Bao, Xiaoyi. 2013. "Distributed Temperature and Strain Discrimination with Stimulated Brillouin Scattering and Rayleigh Backscatter in an Optical Fiber." Sensors 13, no. 2: 1836-1845.

Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert