Title :
Polarization modulation errors in all-fiber depolarized gyroscopes
Author :
Szafraniec, Bogdan ; Blake, James
Author_Institution :
Honeywell Technol. Center, Honeywell Inc., Phoenix, AZ, USA
fDate :
9/1/1994 12:00:00 AM
Abstract :
Polarization modulation errors in all-fiber depolarized gyros having imperfect depolarization are examined. As in the case of PM fiber gyros, birefringence modulation is shown to give rise to quadrature errors. In addition, we demonstrate the existence of a small time lag between the modulation of the two linear polarization states of a fiber-wound PZT modulator by correlating this effect with an associated signal channel error. Proper frequency operation and/or good depolarization of the light act to reduce both types of errors
Keywords :
birefringence; fibre optic sensors; gyroscopes; light polarisation; measurement errors; optical fibres; optical modulation; PM fiber gyros; PZT; PbZrO3TiO3; all-fiber depolarized gyroscopes; birefringence modulation; depolarization; fiber-wound PZT modulator; frequency operation; imperfect depolarization; linear polarization states; polarization modulation errors; quadrature errors; signal channel error; small time lag; Birefringence; Coils; Delay effects; Fading; Frequency; Gyroscopes; Optical fiber polarization; Phase modulation; Samarium; Signal processing;
Journal_Title :
Lightwave Technology, Journal of
