Dual-modulation fiber Fabry-Perot interferometer with double reflection for slowly-varying displacements

被引：18

作者：

Seat, H. C. ^{[1
,2
]}

Chawah, P. ^{[3
]}

Cattoen, M. ^{[1
,2
]}

Sourice, A. ^{[4
]}

Plantier, G. ^{[4
]}

Boudin, F. ^{[3
]}

Chery, J. ^{[3
]}

Brunet, C. ^{[5
]}

Bernard, P. ^{[5
]}

Suleiman, M. ^{[6
]}

机构：

[1] CNRS, LAAS, F-31077 Toulouse, France

[2] Univ Toulouse, INP, LAAS, F-31077 Toulouse, France

[3] Univ Montpellier 2, Geosci Montpellier UMR 5243, F-34095 Montpellier, France

[4] ESEO, Grp Signal Image & Instrumentat, F-49009 Angers, France

[5] Inst Phys Globe Paris, Equipe Sismol, F-75238 Paris, France

[6] CNRS, Lab Natl Champs Magnet Intenses Toulouse, F-31400 Toulouse, France

来源：

OPTICS LETTERS | 2012年 / 37卷 / 14期

关键词：

LASER; TIME;

D O I：

10.1364/OL.37.002886

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This Letter describes a dual-amplitude modulation technique incorporated into a double reflection extrinsic-type fiber Fabry-Perot interferometer to measure periodic, nonperiodic as well as quasi-static displacements. The modulation scheme simultaneously maintains the interference signal pair in quadrature and provides a reference signal for displacements inferior to a quarter of the source wavelength. The control and phase demodulation of the interferometer carried out via software enable quasi-real-time measurement and facilitates sensor alignment. The sensor system can be exploited in the low frequency range from 10(-3) to similar to 500 Hz and has a resolution better than 2.2 nm, targeting applications in geophysics. (C) 2012 Optical Society of America

引用

页码：2886 / 2888

页数：3

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