Title :
Optical fiber vibration sensor using (Pancharatnam) phase step interferometry
Author :
Ferrari, José A. ; Frins, Erna M. ; Dultz, Wolfgang
Author_Institution :
Fac. de Ingenieria, Inst. de Fisica, Montevideo, Uruguay
fDate :
6/1/1997 12:00:00 AM
Abstract :
A fiber-optic vibration sensor based on polarization and phase-step interferometry is reported. Left- and right-circularly polarized light coming back from the reference and signal arms of a modified Michelson fiber interferometer is processed with an array of five linear analyzers separated angular steps of π/4 (rad) from each other. Thus, five interference patterns are acquired simultaneously and the dynamical phase retrieval problem is reduced to five-step interferometry in the time-domain. A vibration sensor as described above was built by the authors and its performance was investigated
Keywords :
Michelson interferometers; fibre optic sensors; light interferometry; optical fibre polarisation; optical rotation; vibration measurement; Pancharatnam phase step interferometry; angular steps; dynamical phase retrieval problem; interference patterns; left-circularly polarized light; light interferometry; linear analyzers; modified Michelson fiber interferometer; optical fiber vibration sensor; polarization interferometry; right-circularly polarized light; signal arms; time-domain; Arm; Interference; Optical arrays; Optical fiber polarization; Optical fiber sensors; Optical fibers; Optical interferometry; Signal analysis; Signal processing; Time domain analysis;
Journal_Title :
Lightwave Technology, Journal of
