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High-accuracy Brillouin frequency shift measurement system based on stimulated Brillouin scattering phase shift.
- Source :
-
Optical Engineering . May2017, Vol. 56 Issue 5, p1-6. 6p. 2 Diagrams, 4 Graphs. - Publication Year :
- 2017
-
Abstract
- A high-accuracy Brillouin frequency shift (BFS) measurement system for vector Brillouin optical timedomain 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00913286
- Volume :
- 56
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Optical Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 123499637
- Full Text :
- https://doi.org/10.1117/1.OE.56.5.056102