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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3634–3637

Radio-frequency low-coherence interferometry

Carlos R. Fernández-Pousa, José Mora, Haroldo Maestre, and Pablo Corral  »View Author Affiliations


Optics Letters, Vol. 39, Issue 12, pp. 3634-3637 (2014)
http://dx.doi.org/10.1364/OL.39.003634


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Abstract

A method for retrieving low-coherence interferograms, based on the use of a microwave photonics filter, is proposed and demonstrated. The method is equivalent to the double-interferometer technique, with the scanning interferometer replaced by an analog fiber-optics link and the visibility recorded as the amplitude of its radio-frequency (RF) response. As a low-coherence interferometry system, it shows a decrease of resolution induced by the fiber’s third-order dispersion (β3). As a displacement sensor, it provides highly linear and slope-scalable readouts of the interferometer’s optical path difference in terms of RF, even in the presence of third-order dispersion. In a proof-of-concept experiment, we demonstrate 20-μm displacement readouts using C-band EDFA sources and standard single-mode fiber.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(110.4500) Imaging systems : Optical coherence tomography
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 14, 2014
Manuscript Accepted: May 5, 2014
Published: June 12, 2014

Virtual Issues
Vol. 9, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Carlos R. Fernández-Pousa, José Mora, Haroldo Maestre, and Pablo Corral, "Radio-frequency low-coherence interferometry," Opt. Lett. 39, 3634-3637 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-12-3634


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