Theory of an amplified closed-Sagnac-loop interferometric fiber-optic gyroscope

Author

Liaw, Chin-Yi ; Zhou, Yan ; Lam, Yee-Loy

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

35

Issue

12

fYear

36495

fDate

12/1/1999 12:00:00 AM

Firstpage

1777

Lastpage

1785

Abstract

An amplified closed-Sagnac loop interferometric fiber optic gyroscope (AC-IFOG) has been proposed and demonstrated in our earlier work. This paper reports the theoretical analysis of its operation. The analysis has been focused on the effect of the erbium-doped fiber amplifier (EDFA) inserted within the reentrant path. The analysis shows that the sensitivity can be improved by at least two orders of magnitude as compared to a conventional IFOG if the EDFA is an ideal device. The simulated open-loop response coincides well with that of the experimental data. Further analysis shows that the detection limit is restricted by the beat noise that build ups rapidly in successive circulations. The rate of noise build-up depends greatly on the optical bandwidth of the closed-Sagnac loop

Keywords

fibre optic gyroscopes; light interferometry; optical fibre amplifiers; sensitivity; EDFA; IFOG; amplified closed-Sagnac-loop interferometric fiber-optic gyroscope; beat noise; closed-Sagnac loop; detection limit; erbium-doped fiber amplifier; ideal device; noise build-up; optical bandwidth; orders of magnitude; reentrant path; simulated open-loop response; successive circulations; Coils; Erbium-doped fiber amplifier; Gyroscopes; Optical fiber couplers; Optical fiber devices; Optical fiber theory; Optical fibers; Optical interferometry; Optical ring resonators; Sagnac interferometers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.806583

Filename

806583