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Proceedings Paper

Novel fiber optic contrast-based sensor
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Paper Abstract

The dislocation sensor based on the contrast phenomenon in an unbalanced fiber optic Michelson interferometer with a 3 x 3 coupler and a semiconductor multimode laser used as a source is described. Periodic contrast oscillations, which depend on a laser spectrum, occur if a measuring arm of the interferometer is elongated. So direct contrast-sensitive elongation measurement is limited only to one 200-μm long slope. In this paper we present a method of measuring range expansion up to 8 mm by linearyzation of contrast slopes. Elongation modulator in a reference arm of the interferometer is used. Experimental setup and software were worked out. For 1-m long sensor the 8-mm measuring range was obtained, where the highest difference between real and measured elongation is 25 microns

Paper Details

Date Published: 8 March 2004
PDF: 8 pages
Proc. SPIE 5272, Industrial and Highway Sensors Technology, (8 March 2004); doi: 10.1117/12.518350
Show Author Affiliations
Mieczyslaw Szustakowski, Military Univ. of Technology (Poland)
Norbert Palka, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 5272:
Industrial and Highway Sensors Technology
Brian Culshaw; Samuel David Crossley; Helmut E. Knee; Michael A. Marcus; John P. Dakin, Editor(s)

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