Title :
Phase error bounds of fibre gyro with imperfect polariser/depolariser
Author :
Fredricks, R.J. ; Ulrich, Roger
Author_Institution :
Lear Siegler Inc., Instrument Division, Grand Rapids, USA
Abstract :
In fibre-optic gyroscopes a drifting zero-offset due to changing fibre birefringence may be reduced by inserting a single-mode polarising filter and a depolariser. For a real gyro, in which these components and their alignment are imperfect, bounds are derived for the remaining zero-offset. A simple experimental procedure permits the measurement of that offset.
Keywords :
fibre optics; gyroscopes; light polarisation; measurement errors; nonelectric sensing devices; Sagnac phase shift; depolariser; fibre birefringence variation reduction; fibre-optic gyroscopes; imperfect real gyro; measurement errors; nonelectric sensing devices; phase error bounds; single-mode polarising filter; zero-offset;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840224
