Abstract
Chaotic Brillouin optical correlation domain analysis (BOCDA) has been proposed and experimentally demonstrated with the advantage of high spatial resolution. However, it faces the same issue of the temperature and strain cross-sensitivity. In this paper, the simultaneous measurement of temperature and strain can be preliminarily achieved by analyzing the two Brillouin frequencies of the chaotic laser in a large-effective-area fiber (LEAF). A temperature resolution of 1 °C and a strain resolution of 20 µε can be obtained with a spatial resolution of 3.9 cm. The actual temperature and strain measurement errors are 0.37 °C and 10 µε, respectively, which are within the maximum measurement errors.
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Acknowledgment
This work was supported in part by the National Natural Science Foundation of China (NSFC) (Grant Nos. 61527819 and 61875146), in part by the Research Project Supported by Shanxi Province Youth Science and Technology Foundation (Grant No. 201601D021069), in part by the Key Research and Development Program (High-Tech Field) of Shanxi Province (Grant Nos. 201803D121064 and 201803D31044), in part by the Program for Sanjin Scholar, in part by the Transformation of Scientific and Technological Achievements Programs (TSTAP) of Higher Education Institutions in Shanxi, and in part by the Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi.
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Zhang, X., Liu, S., Zhang, J. et al. Simultaneous Strain and Temperature Measurement Based on Chaotic Brillouin Optical Correlation-Domain Analysis in Large-Effective-Area Fibers. Photonic Sens 11, 377–386 (2021). https://doi.org/10.1007/s13320-020-0609-y
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DOI: https://doi.org/10.1007/s13320-020-0609-y