Translator Disclaimer
Paper
17 May 2011 A novel positioning method for dual Mach-Zehnder interferometric vibration sensor in submarine cable security application
Author Affiliations +
Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77530L (2011) https://doi.org/10.1117/12.885172
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
Abstract
Dual Mach-Zehnder interferometric vibration sensor is an appropriate solution for submarine cable security application. While in this application the detected vibration signal is always narrow-bandwidth and short-duration subject to environmental constraints, which makes correlation based vibration positioning algorithm a poor robustness to noise. A preprocessing method focusing on expanding signal 3dB bandwidth before correlation is proposed in purpose of reducing ultimate positioning mean square error. A high pass filter is imposed to enhance the weight of high frequency components by attenuating low frequency main lobe. Field test results indicate a significant positioning error reduction when using this novel method as long as the cutoff frequency of high pass filter is selected in a valid region where positive effect of bandwidth extension is larger than effect of SNR reduction, and MSE reduction value in valid region agrees well with theoretical prediction.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shangran Xie, Min Zhang, Yanhe Li, and Yanbiao Liao "A novel positioning method for dual Mach-Zehnder interferometric vibration sensor in submarine cable security application", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77530L (17 May 2011); https://doi.org/10.1117/12.885172
PROCEEDINGS
4 PAGES


SHARE
Advertisement
Advertisement
Back to Top