Modeling analysis and calculation of a brillouin optical time domain reflectometer system using multi longitudinal mode FP laser

被引：0
作者：
Li Y.-Q. [1 ]
Cao C.-X. [1 ]
Li X.-J. [1 ]
An Q. [1 ]
机构：
[1] Department of Electronic and Communication Engineering, North China Electric Power University, Baoding, 071003, Hebei
来源：
Guangzi Xuebao/Acta Photonica Sinica | 2016年 / 45卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Brillouin optical time domain reflectometer; Fiber optics; Multi-longitudinal mode FP laser; Optical fiber sensing; Self-heterodyne detection; Signal to noise ratio;
D O I：
10.3788/gzxb20164505.0506001
中图分类号：
学科分类号：
摘要：
By using the theory of coherent detection, a Brillouin optical time domain reflectometer sensing system was proposed based on the external modulation of multi-longitudinal mode Fabry-Perot laser and the self-heterodyne detection of Rayleigh and Brillouin scattering. The principles of the stimulated Brillouin scattering threshold improvement by the utilization of the multi-longitudinal mode Fabry-Perot laser, the self-heterodyne detection of Rayleigh and Brillouin scattering were analyzed, the expression of signal-to-noise ratio of the system was deduced, and the longitudinal mode number dependences of peak power and bandwidth of superposed Brillouin spectrum, and signal to noise ratio, temperature and strain measurement accuracy of the system were analyzed and calculated. The results show that with the increasing of the longitudinal mode number, the signal to noise ratio, temperature and strain measurement accuracy of the system at the end of 25 km long fiber are improved significantly for a multi-longitudinal mode Fabry-Perot laser with a mode interval of 0.141 nm, and the optimal value of temperature and strain measurement accuracy is 3.81℃ and 86.69 με respectively, when the longitudinal mode number takes the number of 19. © 2016, Science Press. All right reserved.
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页数：7
相关论文
共 19 条
[1]  
Bao X.-Y., Chen L., Recent progress in Brillouin scattering based fiber sensors, Sensors, 11, 4, pp. 4152-4187, (2011)
[2]  
Kee H.H., Lees G.P., Newson T.P., All fiber system for simultaneous interrogation of distributed strain and temperature sensing by spontaneous Brillouin scattering, Optics Letters, 25, 10, pp. 695-697, (2000)
[3]  
Yang W., Yang Y.-H., Digital envelope detection technique for Brillouin optical time-domain reflectometry based on generalized harmonic wavelet transform, Acta Optica Sinica, 33, 5, pp. 38-46, (2013)
[4]  
Bi W.-H., Yang X.-P., Li J.-Y., Et al., Forward and backward Raman amplification of Brillouin scattering signal in Brillouin optical time domain reflectometer system, Chinese Journal of Lasers, 41, 12, pp. 148-153, (2014)
[5]  
Li Y.-Q., Zhao X., Zhao L.-J., Et al., Brillouin Scattering Parameters of Different Modes in Multimode Optical Fibers, Acta Photonica Sinica, 44, 3, (2015)
[6]  
Li Y.-Q., Li X.-J., An Q., New method to improve the performance of Brillouin optical time domain reflectometer system, Acta Optica Sinica, 35, 1, pp. 61-70, (2015)
[7]  
Aoki Y., Tajima K., Mito I., Input power limits of single mode optical fibers due to stimulated Brillouin scattering in optical communication systems, Journal of Lightwave Technology, 6, 5, pp. 710-719, (1988)
[8]  
Soto M.A., Bolognini G., Pasquale F.D., Distributed optical fibre sensors based on spontaneous Brillouin scattering employing multimode Fabry-Perot lasers, Electronics Letters, 45, 21, pp. 1071-1072, (2009)
[9]  
Soto M.A., Bolognini G., Pasquale F.D., Use of Fabry-Perot lasers for simultaneous distributed strain and temperature sensing based on hybrid Raman and Brillouin scattering, 7503, (2009)
[10]  
Li C.-L., Lu Y.-G., Zhang X.-P., SNR enhancement in Brillouin optical time domain reflectometer using multi-waelength coherent detection, Electronics Letters, 48, 18, pp. 1139-1141, (2012)
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