Two-interferometers fibre optic sensor for disturbance localization

Marek Zyczkowski; Wieslaw Ciurapinski; Marcin Kondrat

doi:10.1117/12.622793

28 September 2005 Two-interferometers fiber optic sensor for disturbance localization

Marek Zyczkowski, Wieslaw Ciurapinski, Marcin Kondrat

Proceedings Volume 5952, Optical Fibers: Applications; 59521E (2005) https://doi.org/10.1117/12.622793
Event: Congress on Optics and Optoelectronics, 2005, Warsaw, Poland

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.

Citation Download Citation

Marek Zyczkowski, Wieslaw Ciurapinski, and Marcin Kondrat "Two-interferometers fiber optic sensor for disturbance localization", Proc. SPIE 5952, Optical Fibers: Applications, 59521E (28 September 2005); https://doi.org/10.1117/12.622793

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