Vibration Disturbance Localization Using a Serial Array of Identical Low-Finesse Fiber Fabry-Perot Interferometers

An optical fiber sensor system for localization of a vibrational disturbance along the fiber is presented. The sensor system is based on a serial array of identical Fabry-Perot interferometers, formed directly in the single mode SMF-28e fiber by pairs of fiber Bragg gratings with reflectivity of 0.0...

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Bibliographic Details
Published in:IEEE sensors journal 2012-01, Vol.12 (1), p.124-127
Main Authors: Manuel, R. M., Shlyagin, M. G., Miridonov, S. V., Meyer, J.
Format: Article
Language:English
Subjects:
Arrays
Fiber Bragg grating
Frequency modulation
Interferometers
low-finesse Fabry-Perot interferometer
Optical fiber cables
optical fiber sensor
Optical fiber sensors
Optical fibers
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Summary:An optical fiber sensor system for localization of a vibrational disturbance along the fiber is presented. The sensor system is based on a serial array of identical Fabry-Perot interferometers, formed directly in the single mode SMF-28e fiber by pairs of fiber Bragg gratings with reflectivity of 0.04% each. Interferometers were interrogated by an intensity modulated distributed feedback diode laser. We present a signal processing algorithm for localization of a disturbed interferometer and experimental results for a serial array of 14 in-fiber interferometers. Simple sensor configuration and the use of low-frequency components make it potentially inexpensive and suitable for applications where continuous monitoring for appearance of vibrations is required.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2011.2119479