Backscatter-induced noise and crosstalk in a FDM multidimensional gyro system using two bias modulators in each gyro loop

Author

Jin, W. ; Cairns, K.J. ; Andonovic, I. ; Culshaw, B.

Author_Institution

Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK

Volume

142

Issue

6

fYear

1995

fDate

12/1/1995 12:00:00 AM

Firstpage

253

Lastpage

258

Abstract

Characteristics of backscatter-induced noise and crosstalk in a multidimensional FDM fibre-optic gyro system, using two bias modulators in each gyro loop, are investigated. The induced noise is in the order of a few degree per hour for a 1 mm coherence length source and typical gyro parameters. The crosstalk is larger than the noise and increases with the number of gyros to be multiplexed. Both the noise and crosstalk can be reduced by using proper modulation depths and frequencies. The noise can also be eliminated by using 50/50 loop couplers

Keywords

backscatter; coherence length; fibre optic sensors; frequency division multiplexing; gyroscopes; light scattering; optical crosstalk; optical fibre couplers; optical modulation; optical noise; 50/50 loop couplers; FDM multidimensional gyro system; backscatter-induced noise; bias modulators; coherence length source; crosstalk; gyro loop; induced noise; multidimensional FDM fibre-optic gyro system; multiplexed; optical fibre couplers; proper modulation depths; typical gyro parameters;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:19952268

Filename

487657