Abstract

A distributed fiber-optic sensor system is proposed and demonstrated for long-distance intrusion-detection, which employs the hybrid time/wavelength division multiplexing architecture. The sensing elements are single-mode telecommunication fiber which can be hanged on the fence and hedge or buried along the monitored perimeter. The pulsed light generated by the superluminescent diode was filtered by the filter which has multichannel (m = 6), and then amplified by erbium-doped fiber amplifiers. A 1 × (n+1) (n=20) splitter of which every port has a fiber delay coil except the first port splits the amplified light. The fiber delay coils have different lengths, which generate different delay time and produce n time zones. By utilizing the m channel dense wave-length division multiplexing modules, every fiber sensing unit (OSU)-based unbalance Mach–Zehnder Sagnac interferometer technology occupy a time zone and a wavelength. By utilizing 20 time zones and 6 wavelengths, the system contains up to 120 OSUs, of which the distributed sensing distance is from 0 to 500 m. So, the whole sensing distance of this system could reach 60 km. The system has been demonstrated to stably run over six months with the false alarm rate of less than 4%.

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2008 (1)

Q. Sun, D. Liu, J. Wang, H. Liu, "Distributed fiber-optic vibration sensor using a ring Mach–Zehnder interferometer," Opt. Commun. 281, 1538-1544 (2008).

2006 (1)

B. Culshaw, "The optical fibre Sagnac interferometer: An overview of its principles and applications," Meas. Sci. Technol. 17, R1-R16 (2006).

2004 (1)

W.-W. Lin, "Novel distributed fiber optic leak detection system," Opt. Eng. 43, 278-279 (2004).

2003 (1)

J. Park, H. F. Taylor, "Fiber optic intrusion sensor using coherent optical time domain reflectometer," Jpn. J. Appl. Phys. 42, 3481-3482 (2003).

1998 (1)

1992 (1)

F. Parvaneh, "Forward-scatter frequency derived distributed optical fiber sensing using the optical Kerr effect," Electron. Lett. 28, 1080-1082 (1992).

1982 (1)

T. G. Giallorenzi, G. H. Sigel, Jr.J. A. Bucaro, "Optical fibre optic sensor technology," IEEE J. Quantum Electron. QE-18, 626-660 (1982).

Appl. Opt. (1)

Electron. Lett. (1)

F. Parvaneh, "Forward-scatter frequency derived distributed optical fiber sensing using the optical Kerr effect," Electron. Lett. 28, 1080-1082 (1992).

IEEE J. Quantum Electron. (1)

T. G. Giallorenzi, G. H. Sigel, Jr.J. A. Bucaro, "Optical fibre optic sensor technology," IEEE J. Quantum Electron. QE-18, 626-660 (1982).

Jpn. J. Appl. Phys. (1)

J. Park, H. F. Taylor, "Fiber optic intrusion sensor using coherent optical time domain reflectometer," Jpn. J. Appl. Phys. 42, 3481-3482 (2003).

Meas. Sci. Technol. (1)

B. Culshaw, "The optical fibre Sagnac interferometer: An overview of its principles and applications," Meas. Sci. Technol. 17, R1-R16 (2006).

Opt. Commun. (1)

Q. Sun, D. Liu, J. Wang, H. Liu, "Distributed fiber-optic vibration sensor using a ring Mach–Zehnder interferometer," Opt. Commun. 281, 1538-1544 (2008).

Opt. Eng. (1)

W.-W. Lin, "Novel distributed fiber optic leak detection system," Opt. Eng. 43, 278-279 (2004).

Other (11)

A. D. Kersey, "Recent progress in interferometric fibre sensor technology," Proc. Int. Soc. Opt. Eng. (1990) pp. 2-12.

A. Yap, T. Vo, H. Wijaya, "A fiber optic acoustic sensor based on the sagnac interferometer," Proc. Int. Soc. Opt. Eng. (1995) pp. 87-.

A. A. Chtcherbakov, P. L. Swart, S. J. Spammer, "A fiber optic disturbance location sensor using modified Sagnac and Mach–Zehnder interferometers," presented at the Opt. Fiber Sens. Conf. WilliamsburgVA (1997) Paper OThC28.

M. Lee, H. F. Taylor, "Distributed fiber optic intrusion detection system with improved sensitivity, optical fiber sensors," OSA Tech. Digest (CD) (Opt. Soc. Amer.) CancúnMexico (2006) Paper WB6.

J. Park, W. Lee, H. F. Taylor, "A fiber optic intrusion sensor with the configuration of an optical time domain reflectometer using coherent interference of Rayleigh backscattering," Proc. Int. Soc. Opt. Eng. (1996) pp. 49-56.

M. Szustakowski, M. Życzkowski, "Fiber optic sensors for perimeter security with intruder localization," presented at the Proc. Int. Soc. Opt. Eng. WarsawPoland (2005) 5954.

J. Bush, C. Davis, P. Davis, A. C. F. McNair, "Buried fiber intrusion detection sensor with minimal false alarm rates," Proc. Int. Soc. Opt. Eng. (1996) pp. 30-40.

H. F. Taylor, C. E. Lee, Apparatus and method for fiber optic intrusion sensing U.S. Patent 5 194 647 (1993).

C. Y. Leung, I. Chang, Si-Hsu, "Fiber optic line sensing system for perimeter protection system against intrusion," Proc. Conf. Opt. Fiber Sens. (1986) pp. 113-116.

B. Griffiths, "Development in and applications of fibre optic intrusion detection sensors," Proc. IEEE, 29th Annu. Int. Conf. Security Technol. (1995) pp. 325-330.

Y.-J. Rao, J. Luo, Z.-L. Ran, J.-F. Yue, X.-D. Luo, Z. Zhou, "Long-distance fiber-optic $\Phi$-OTDR intrusion sensing system," Proc. Int. Soc. Opt. Eng. (2009) pp. 75031O-1-75031O-4.

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