Title :
Multiplexed demodulation of quasi-static measurands without a receiving interferometer
Author :
McGarrity, C. ; Jackson, D.A.
Author_Institution :
Phys. Lab., Kent Univ., Canterbury, UK
fDate :
6/20/1996 12:00:00 AM
Abstract :
The classical technique of dual wavelength interferometry is used to determine the absolute OPD of very short cavities using a parametric plot of the relative interferometric intensities. A network of eight sensors is demonstrated with phase resolution of 1.5 mrad corresponding to 0.2 nm with an unambiguous range of 114 μm
Keywords :
Mach-Zehnder interferometers; fibre optic sensors; multiplexing; optical modulation; absolute OPD; dual wavelength interferometry; fibre optic sensors; multiplexed demodulation; parametric plot; phase resolution; quasi-static measurands; receiving interferometer; very short cavities;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960771
