Title :
Demodulation scheme fibre interferometric sensors employing laser frequency switching
Author :
Kersey, A.D. ; Jackson, D.A. ; Corke, M.
Author_Institution :
University of Kent at Canterbury, Physics Laboratory, Canterbury, UK
Abstract :
A demodulation technique suitable for use with fibre interferometric sensors is described. The scheme employs a frequency switched diode laser and an unbalanced Mach-Zehnder interferometer. Minimum phase sensitivity ¿ 2× 10-5 rad is obtainable, and can be shown to be limited by the laser phase noise.
Keywords :
demodulation; fibre optics; light interferometers; nonelectric sensing devices; Mach-Zehnder interferometer; demodulation scheme fibre interferometric sensors; laser frequency switching; phase noise; phase sensitivity;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830073
