Loop Topology Based White Light Interferometric Fiber Optic Sensor Network for Application of Perimeter Security

Libo YUAN; Yongtao DONG

doi:doi:10.1007/s13320-010-0009-9

Photonic Sensors, 2011, 1 (3): 260, Published Online: Oct. 24, 2013

Loop Topology Based White Light Interferometric Fiber Optic Sensor Network for Application of Perimeter Security

论文大纲

Libo YUAN ^1,*Yongtao DONG ²

Author Affiliations

¹ Key Laboratory of Optical Fiber Sensors (Heilongjiang Province), Photonics Research Center, College of Science, Harbin Engineering University, Harbin, 150001, China

² Department of Civil and Environmental Engineering, University of Alaksa Fairbanks, Fairbanks, AK 99709, USA

Optical fiber sensors quasi-distributed sensing system perimeter security white light interferometry

Abstract

A loop topology based white light interferometric sensor network for perimeter security has been designed and demonstrated. In the perimeter security sensing system, where fiber sensors are packaged in the suspended cable or buried cable, a bi-directional optical path interrogator is built by using Michelson or Mach-Zehnder interferometer. A practical implementation of this technique is presented by using an amplified spontaneous emission (ASE) light source and standard single mode fiber, which are common in communication industry. The sensor loop topology is completely passive and absolute length measurements can be obtained for each sensing fiber segment so that it can be used to measure quasi-distribution strain perturbation. For the long distance perimeter monitoring, this technique not only extends the multiplexing potential, but also provides a redundancy for the sensing system. One breakdown point is allowed in the sensor loop because the sensing system will still work even if the embedded sensor loop breaks somewhere.

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Libo YUAN, Yongtao DONG. Loop Topology Based White Light Interferometric Fiber Optic Sensor Network for Application of Perimeter Security[J]. Photonic Sensors, 2011, 1(3): 260.

Loop Topology Based White Light Interferometric Fiber Optic Sensor Network for Application of Perimeter Security

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