8 March 2004 Novel fiber optic contrast-based sensor
Author Affiliations +
Proceedings Volume 5272, Industrial and Highway Sensors Technology; (2004) https://doi.org/10.1117/12.518350
Event: Optical Technologies for Industrial, Environmental, and Biological Sensing, 2003, Providence, RI, United States
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
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mieczyslaw Szustakowski, Norbert Palka, "Novel fiber optic contrast-based sensor", Proc. SPIE 5272, Industrial and Highway Sensors Technology, (8 March 2004); doi: 10.1117/12.518350; https://doi.org/10.1117/12.518350
PROCEEDINGS
8 PAGES


SHARE
Back to Top