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