A new scheme for the distributed intrusion detection system based on the polarization optical time
domain reflectometry (POTDR) for multi-event detection is proposed in this paper. In the scheme, a
polarization maintaining fiber is employed as the distributed pressure sensor instead of the single mode
fiber. The working principle of the system is described in detail, and an experimental system is setup to
confirm the ability to detect several intrusion events happened at the same time along the sensing fiber
by measuring the polarization mode coupling coefficient caused by the pressure and three simulated
events. And from the final experimental result denoised using wavelet transformation, the three intrusion events can be significantly detected.
License type:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Funding Info:
This research was supported by the National Natural Science Foundation of China under Grant nos. 61275079, 61377070, 61335004, and 61275031, the National Basic Research Program of China under Grant 2014CB340102, the 863 program of China No. 2013AA014203 and the Open Research of Beijing University of
Posts and Telecommunications No.IOOC2013A002.