Title:
APPARATUS FOR INTERFEROMETRIC SENSING
Document Type and Number:
WIPO Patent Application WO2007045028
Kind Code:
A9
Abstract:
An apparatus for interferometric sensing, comprising a plurality of single-longitudinal mode laser sources to each provide radiation at a corresponding plurality of selected wavelengths, and at least one modulator to frequency or phase modulate the radiation from each laser; a plurality of Fabry-Perot interferometers formed by Bragg Gratings written into optical fibre, each interferometer being responsive to one of the said plurality of wavelengths to each produce a reflected or transmitted optical output signal dependent on the corresponding interferometer path length; and one or more demodulators to demodulate the optical output signals and produce a corresponding plurality of measurement signals indicative of optical path lengths of the respective interferometers.
Inventors:
CHOW JONG H (AU)
GRAY MALCOLM B (AU)
MCCLELLAND DAVID E (AU)
GRAY MALCOLM B (AU)
MCCLELLAND DAVID E (AU)
Application Number:
PCT/AU2006/001541
Publication Date:
November 01, 2007
Filing Date:
October 18, 2006
Export Citation:
Assignee:
UNIV AUSTRALIAN (AU)
CHOW JONG H (AU)
GRAY MALCOLM B (AU)
MCCLELLAND DAVID E (AU)
CHOW JONG H (AU)
GRAY MALCOLM B (AU)
MCCLELLAND DAVID E (AU)
International Classes:
G01D5/26; G01B9/02; G01J9/02; G01L1/24
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