Feedback effects in erbium-doped fiber amplifier/source for open-loop fiber-optic gyroscope

Author

Park, Hee Gap ; Lim, Kyoung Ah ; Chin, Young-Jun ; Kim, Byoung Yoon

Author_Institution

Dept. of Phys., Chonbuk Nat. Univ., Chonju, South Korea

Volume

15

Issue

8

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

1587

Lastpage

1593

Abstract

We have investigated rotation-dependent feedback effects in an erbium-doped fiber source for an open-loop fiber-optic gyroscope with fiber amplifier/source configuration. Average power and optical spectrum of the source output as well as of the amplified signal output were found to vary depending on the rotation rate, resulting in the distortion of the gyroscope output. The distorted gyroscope output could be quantitatively explained by a theoretical model with the assumption that the source power and the gain variation due to feedback depends primarily on the average feedback signal power. It was found that the distortion in gyroscope output due to rotation-dependent feedback can be minimized when the phase difference is modulated with an amplitude of 2.405 rad where the average feedback signal power becomes independent of the rotation rate

Keywords

erbium; fibre lasers; fibre optic sensors; gyroscopes; optical feedback; optical fibre theory; optical noise; amplified signal output; average feedback signal; average feedback signal power; average power; distorted gyroscope; erbium-doped fiber amplifier; feedback effects; gain variation; gyroscope output; open-loop fiber-optic gyroscope; optical spectrum; phase difference; rotation rate; rotation-dependent feedback; rotation-dependent feedback effects; Amplitude modulation; Erbium-doped fiber amplifier; Gyroscopes; Optical distortion; Optical feedback; Optical fiber amplifiers; Output feedback; Phase distortion; Phase modulation; Stimulated emission;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.618394

Filename

618394