论文信息 - High sampling rate multi-pulse phase-sensitive OTDR employing frequency division multiplexing

High sampling rate multi-pulse phase-sensitive OTDR employing frequency division multiplexing

A novel high sampling rate multi-pulse phase-sensitive OTDR (Φ-OTDR) employing frequency division multiplexing (FDM) is proposed to increase the sampling rate of the long distance sensor system. Compared with the conventional Φ- OTDR, the new system owns much higher detection bandwidth as more probe pulses are allowed simultaneously traveling in the sensing fiber. The feasibility of the technique is experimentally verified. By multiplexing four different frequencies, we realize a experimental system with 20kHz vibration detection bandwidth over 10km sensing range.

[1] Xiaoyi Bao,et al. Distributed Vibration Sensor Based on Coherent Detection of Phase-OTDR , 2010, Journal of Lightwave Technology.

[2] Henry F. Taylor,et al. Distributed fiber optic pressure/seismic sensor for low-cost monitoring of long perimeters , 2003, SPIE Defense + Commercial Sensing.

[3] Massimo L. Filograno,et al. Coherent Noise Reduction in High Visibility Phase-Sensitive Optical Time Domain Reflectometer for Distributed Sensing of Ultrasonic Waves , 2013, Journal of Lightwave Technology.

[4] Juan C Juarez,et al. Polarization discrimination in a phase-sensitive optical time-domain reflectometer intrusion-sensor system. , 2005, Optics letters.

[5] Jun Zhou,et al. Interference-fading-free phase-demodulated OTDR system , 2012, Other Conferences.

[6] J. Juarez,et al. Distributed fiber-optic intrusion sensor system , 2005, Journal of Lightwave Technology.

[7] X. Bao,et al. High Sensitivity Distributed Vibration Sensor Based on Polarization-Maintaining Configurations of Phase-OTDR , 2011, IEEE Photonics Technology Letters.

[8] H. Cai,et al. Characteristics and Explanations of Interference Fading of a $\phi $ -OTDR With a Multi-Frequency Source , 2013, Journal of Lightwave Technology.

[9] Qing Ye,et al. Phase-sensitive OTDR system based on digital coherent detection , 2011, 2011 Asia Communications and Photonics Conference and Exhibition (ACP).