DEMODULATION OF 2 TIME-MULTIPLEXED FIBER BRAGG SENSORS USING SOURCE SPECTRAL CHARACTERISTICS

Citation
La. Ferreira et al., DEMODULATION OF 2 TIME-MULTIPLEXED FIBER BRAGG SENSORS USING SOURCE SPECTRAL CHARACTERISTICS, Pure and applied optics, 6(6), 1997, pp. 717-726
Citations number
6
Journal title
ISSN journal
09639659
Volume
6
Issue
6
Year of publication
1997
Pages
717 - 726
Database
ISI
SICI code
0963-9659(1997)6:6<717:DO2TFB>2.0.ZU;2-E
Abstract
A passive all-fibre technique for fibre Bragg grating wavelength shift detection which has been discussed previously is used here for the de modulation of two Bragg sensors placed in a tree topology and addresse d in time. The scheme involves a light source with a particular spectr al profile that allows the direct tracking of the Bragg wavelength shi fts, providing satisfactory resolution over a large dynamic range and a direct application in demultiplexing fibre sensing systems. Experime ntal results are presented relative to the measurement of static and d ynamic strain, as well as temperature.