Title :
Coherent backscatter-induced drift in phase-modulated optical fibre gyroscopes
Author :
Giles, Ian P. ; Mackintosh, J. ; McMillan, Justine ; Culshaw, Brian
Author_Institution :
University of Strathclyde, Eleclronic & Electrical Engineering Deportment, Glasgow, UK
Abstract :
The rotation rate measurement error produced by back-scatter from a partially coherent source has been investigated. The level of error introduced is shown to be dependent on the phase-modulation frequency. Operation at the correct frequency completely eliminates the coherent backscatter-induced errors. Taking into consideration realistic modulator stability conditions a source with a coherence length of tens of centimetres is feasible in an inertial grade, phase-modulated system.
Keywords :
angular velocity measurement; backscatter; fibre optic sensors; gyroscopes; light scattering; measurement errors; phase modulation; coherent backscatter-induced errors; inertial grade; measurement errors; modulator stability conditions; optical fibre gyroscopes; partially coherent source; phase-modulation frequency; rotation rate measurement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860336
