Title :
Open-loop output and scale factor stability in a fiber-optic gyroscope
Author :
Moeller, R.P. ; Burns, W.K. ; Frigo, N.J.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
Abstract :
An all-fiber open-loop, fiber-optic interferometric gyro with polarization-preserving fiber with 14-dB insertion loss and 20-dB polarization extinction is described. The random drift coefficient is 3.2*10/sup -40// square root h for a 1-km coil length on a 16-cm radius. Bias drift is within 0.03 degrees /h over three days. Source coherence effects and optical feedback are shown to result in additional terms in the demodulated output, which can be corrected for. A procedure for obtaining scale-factor coefficients is described. With modeling for temperature and source drive current, these coefficients are measured to be stable within 32 p.p.m. over 12 days.<>
Keywords :
fibre optic sensors; gyroscopes; light interferometry; light polarisation; optical fibres; 14 dB; all-fibre open-loop gyro; coherence; fiber-optic gyroscope; insertion loss; interferometric gyro; optical feedback; polarization extinction; polarization-preserving fiber; scale factor stability; scale-factor coefficients; source drive current; Circuit stability; Gyroscopes; Insertion loss; Open loop systems; Optical feedback; Optical fiber couplers; Optical fiber polarization; Optical filters; Optical interferometry; Optical noise;
Journal_Title :
Lightwave Technology, Journal of
