The advanced method for straightforward spectral signal processing in interferometric fiber-optic sensors is presented. It is based on the analysis of the output spectrum of sensing interferometer in the domain of Fourier images. The main idea of the proposed method is to use the sensing interferometer with finesse > 2 and process the higher harmonics in addition to the first one. The technique does not suffer from power and spectral fluctuations of LED and sufficiently noise resistant.It is insensitive to the influence of parasitic interferometers appearing in the optical connectors, multimode fibers and other parts of the instrument. Devices based on such principles does not recalibration after switching on and further operation. The optimization of sensor's parameters based on numerical simulations is presented switching on and further operation. The optimization of sensor's parameters based on numerical simulations is presented.

Date Published: 2 January 1998
PDF: 5 pages
Proc. SPIE 3201, Sensors and Controls for Advanced Manufacturing, (2 January 1998); doi: 10.1117/12.298023

Published in SPIE Proceedings Vol. 3201:
Sensors and Controls for Advanced Manufacturing
Bartholomew O. Nnaji; Anbo Wang, Editor(s)