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

Volume

7

Issue

2

fYear

1989

Firstpage

262

Lastpage

269

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;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.17765

Filename

17765