Abstract
A novel method of Brillouin scattering spectrum identification based on Sobel operators is proposed in optical fiber sensing system. All of the data collected by the system in different sweeping frequencies can be seen as pixel points of the image, which constitutes a matrix named X. The peak in Brillouin scattering spectrum can be seen as the edge. The method is using Sobel operators s i , s j to convolve with matrix X, which enhanced edge of Brillouin scattering spectrum. Then a line is constructed along the edge to distinguish the Brillouin frequency shift (BFS) directly. In this article, the differences of BFS identified are equal to preset value (\(\Delta \nu_{1} = 0.04\;{\text{GHz}}\),\(\Delta \nu_{2} = 0.02\;{\text{GHz}}\)) and the position of break points identified is approximate to preset value with high accuracy.
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Acknowledgements
The authors are thankful to Science and Technology Development Plan of Jilin Province (Grant Nos. 20150204003GX, 20170204006GX, 20160519010JH).
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Li, J., Wang, D., Wang, Y. et al. A novel method of Brillouin scattering spectrum identification based on Sobel operators in optical fiber sensing system. Opt Quant Electron 50, 27 (2018). https://doi.org/10.1007/s11082-017-1290-2
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DOI: https://doi.org/10.1007/s11082-017-1290-2