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23 November 2016 Influence of stimulated Brillouin scattering on positioning accuracy of long-range dual Mach–Zehnder interferometric vibration sensors
Xiangge He, Shangran Xie, Shan Cao, Fei Liu, Xiaoping Zheng, Min Zhang, Han Yan, Guocai Chen
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Optical Engineering, Vol. 55, Issue 11, 116111 (November 2016). https://doi.org/10.1117/1.OE.55.11.116111
Abstract
The properties of noise induced by stimulated Brillouin scattering (SBS) in long-range interferometers and their influences on the positioning accuracy of dual Mach-Zehnder interferometric (DMZI) vibration sensing systems are studied. The SBS noise is found to be white and incoherent between the two arms of the interferometer in a 1-MHz bandwidth range. Experiments on 25-km long fibers show that the root mean square error (RMSE) of the positioning accuracy is consistent with the additive noise model for the time delay estimation theory. A low-pass filter can be properly designed to suppress the SBS noise and further achieve a maximum RMSE reduction of 6.7 dB.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Xiangge He, Shangran Xie, Shan Cao, Fei Liu, Xiaoping Zheng, Min Zhang, Han Yan, and Guocai Chen "Influence of stimulated Brillouin scattering on positioning accuracy of long-range dual Mach–Zehnder interferometric vibration sensors," Optical Engineering 55(11), 116111 (23 November 2016). https://doi.org/10.1117/1.OE.55.11.116111
Published: 23 November 2016
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Cited by 3 scholarly publications.
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KEYWORDS
Signal to noise ratio
Optical fibers
Scattering
Interference (communication)
Interferometry
Sensors
Interferometers
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