Fiber optic intrusion sensor

Jaehee Park; Henry Fuller Taylor

doi:10.1117/12.252125

24 September 1996 Fiber optic intrusion sensor

Jaehee Park, Henry Fuller Taylor

Proceedings Volume 2895, Fiber Optic Sensors V; (1996) https://doi.org/10.1117/12.252125
Event: Photonics China '96, 1996, Beijing, China

Abstract

The feasibility of producing a practical buried fiber optic sensor with high sensitivity for detecting intruders is demonstrated. Experiments were carried out on such an all fiber Michelson interferometer in which the sensing arm was buried in sand. When a 42 inch sensing arm was buried 8 inches deep in sand, the weight required for a half fringe shift in the sensor output was 22 pounds and the sensitivity was about 10 degrees/pound. The relation between the applied pressure and the phase change was linear. Experimental results indicated that the sensitivity of an optical fiber sensor was sufficient to detect people on foot and vehicles passing over the buried fiber.

Citation Download Citation

Jaehee Park and Henry Fuller Taylor "Fiber optic intrusion sensor", Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); https://doi.org/10.1117/12.252125

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