Chaodong Wang ; Yaling Zhou ; Hui Dong ; Ming Tang ; Songnian Fu, et al. " Quasi-distributed fiber sensor based on Fresnel-reflection-enhanced Incomplete-POTDR system ", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96347F (September 28, 2015); doi:10.1117/12.2194481; http://dx.doi.org/10.1117/12.2194481
A novel scheme of quasi-distributed vibration disturbances detection system based on incomplete Polarization optical time domain reflectometry was proposed. The system was enhanced by employing Fresnel-reflection caused by FC/PC connector, which can improve the signal’s SNR significantly, while the temporal depolarization effect can be almost completely suppressed. Without performing any data averaging, the intrusion event can be detected and located precisely/instantaneously with good stability. Also the frequency components of vibration events applying on sensing fiber can be obtained with large dynamic range. It shows a very good potential in intrusion detection, vibration frequency measuring, etc.
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