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Optical Engineering • Open Access

High-accuracy Brillouin frequency shift measurement system based on stimulated Brillouin scattering phase shift
Author(s): Yongqian Li; Qi An; Xiaojuan Li; Lixin Zhang

Paper Abstract

A high-accuracy Brillouin frequency shift (BFS) measurement system for vector Brillouin optical time-domain analysis-based temperature sensor is proposed, in which double sideband modulation is used and the stimulated Brillouin scattering (SBS) gain and loss processes work together to generate a superimposed SBS phase-shift spectrum. The measurement principle is analyzed by mathematical modeling and the proof-of-concept experiment is performed by using a 100-m long standard single-mode fiber. The theoretical and experimental results reveal that the temperature sensitivity of BFS obtained from the measured SBS phase-shift spectrum is 1.059    MHz / ° C , and the measurement error of temperature is only half that in traditional single sideband-based system, which indicates that the proposed technique can realize high-accuracy temperature measurement and have huge potential in the field of long-distance and high-accuracy sensing.

Paper Details

Date Published: 8 May 2017
PDF: 6 pages
Opt. Eng. 56(5) 056102 doi: 10.1117/1.OE.56.5.056102
Published in: Optical Engineering Volume 56, Issue 5
Show Author Affiliations
Yongqian Li, North China Electric Power Univ. (China)
Qi An, North China Electric Power Univ. (China)
Xiaojuan Li, North China Electric Power Univ. (China)
Lixin Zhang, North China Electric Power Univ. (China)

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