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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 14 — Jul. 15, 2012
  • pp: 2886–2888

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

H. C. Seat, P. Chawah, M. Cattoen, A. Sourice, G. Plantier, F. Boudin, J. Chéry, C. Brunet, P. Bernard, and M. Suleiman  »View Author Affiliations


Optics Letters, Vol. 37, Issue 14, pp. 2886-2888 (2012)
http://dx.doi.org/10.1364/OL.37.002886


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Abstract

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 103 to 500Hz and has a resolution better than 2.2 nm, targeting applications in geophysics.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.5060) Fiber optics and optical communications : Phase modulation
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: January 26, 2012
Revised Manuscript: May 10, 2012
Manuscript Accepted: May 17, 2012
Published: July 11, 2012

Citation
H. C. Seat, P. Chawah, M. Cattoen, A. Sourice, G. Plantier, F. Boudin, J. Chéry, C. Brunet, P. Bernard, and M. Suleiman, "Dual-modulation fiber Fabry-Perot interferometer with double reflection for slowly-varying displacements," Opt. Lett. 37, 2886-2888 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-14-2886

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