Fibre optic gyroscope with single-mode fibre and loop-back phase shift compensation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F17%3APU126263" target="_blank" >RIV/00216305:26620/17:PU126263 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1117/12.2292298" target="_blank" >http://dx.doi.org/10.1117/12.2292298</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2292298" target="_blank" >10.1117/12.2292298</a>

Result language

angličtina

Original language name

Fibre optic gyroscope with single-mode fibre and loop-back phase shift compensation

Original language description

An all-fibre optical sensor of an angular velocity (fibre-optic gyroscope) based on the Sagnac interferometer and using a loop-back phase shift compensation is presented. The sensing loop consists of 760 metres of an ordinary single-mode fibre, which makes this setup cost-effective. To ensure principles of beams reciprocity, randomly induced changes of polarization in the fibre are reduced by using an unpolarized light. This is achieved by a fibre Lyot depolarizer and a super fluorescent fibre source consisting of an erbium-doped fibre pumped by a laser diode. Unlike common approaches to the unpolarized fibre-optic gyroscope with a single-mode fibre, whose output is naturally nonlinear, we use a loop-back compensation of a rotation-induced phase shift to achieve a linear response. In most cases, this technique requires fast electro-optical modulator, which is compatible only with an expensive polarization-maintaining fibre. We use a novel loop-back modulation scheme utilizing only harmonic signals and thus compatible with a piezoelectric fibre stretcher, which can be used with any kind of optical fibre. As result of the closed-loop operation, the range of the gyroscope's linearity is greatly increased and a sensitivity to source power changes is suppressed. We describe the gyroscope setup with proposed modulation method and provide a comparison to the common open-loop setup.

Czech name

—

Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of SPIE

ISBN

9781510617025

ISSN

0277-786X

e-ISSN

—

Number of pages

6

Pages from-to

1-6

Publisher name

SPIE

Place of publication

Prague; Czech Republic

Event location

Praha

Event date

Aug 28, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000425429900008