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Proceedings Paper

Two-interferometers fibre optic sensor for disturbance localization
Author(s): Marek Zyczkowski; Wieslaw Ciurapinski; Marcin Kondrat
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Paper Abstract

Initial researches of Two-interferometers Fibre Optic Sensor for Disturbance Localization will be presented. The sensor is typically susceptible to environmentally induced mechanical perturbation at low frequencies. The presented sensor consists of two interferometers: Sagnac and Michelson. The Sagnac transfer function is proportional to the product of two factors: firstly the rate of change, dφ/dt, of the optical signal, induced at a point by external disturbance, and secondly the distance between the disturbance point and the Sagnac coil centre. The second interferometer transfer function gives an output proportional to φ. So, if we determine a pulsation ω of the mechanical disturbance from both interferometers output signals, we will be able to localize point where the mechanical disturbance takes place along the fibre by means of simple division of these transfer function. A laboratory arrangement of the sensor and the results of numerical signal processing are also shown.

Paper Details

Date Published: 28 September 2005
PDF: 7 pages
Proc. SPIE 5952, Optical Fibers: Applications, 59521E (28 September 2005); doi: 10.1117/12.622793
Show Author Affiliations
Marek Zyczkowski, Military Univ. of Technology (Poland)
Wieslaw Ciurapinski, Military Univ. of Technology (Poland)
Marcin Kondrat, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 5952:
Optical Fibers: Applications
Leszek R. Jaroszewicz; Brian Culshaw; Anna Grazia Mignani, Editor(s)

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