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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 17 — Jun. 10, 2007
  • pp: 3425–3431

Fiber-optical sensor with miniaturized probe head and nanometer accuracy based on spatially modulated low-coherence interferogram analysis

Frank Depiereux, Peter Lehmann, Tilo Pfeifer, and Robert Schmitt  »View Author Affiliations


Applied Optics, Vol. 46, Issue 17, pp. 3425-3431 (2007)
http://dx.doi.org/10.1364/AO.46.003425


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Abstract

Fiber-optical sensors have some crucial advantages compared with rigid optical systems. They allow miniaturization and flexibility of system setups. Nevertheless, optical principles such as low-coherence interferometry can be realized by use of fiber optics. We developed and realized an approach for a fiber-optical sensor, which is based on the analysis of spatially modulated low-coherence interferograms. The system presented consists of three units, a miniaturized sensing probe, a broadband fiber-coupled light source, and an adapted Michelson interferometer, which is used as an optical receiver. Furthermore, the signal processing procedure, which was developed for the interferogram analysis in order to achieve nanometer measurement accuracy, is discussed. A system prototype has been validated thoroughly in different experiments. The results approve the accuracy of the sensor.

© 2007 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: August 30, 2006
Revised Manuscript: February 1, 2007
Manuscript Accepted: February 1, 2007
Published: May 18, 2007

Citation
Frank Depiereux, Peter Lehmann, Tilo Pfeifer, and Robert Schmitt, "Fiber-optical sensor with miniaturized probe head and nanometer accuracy based on spatially modulated low-coherence interferogram analysis," Appl. Opt. 46, 3425-3431 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-17-3425

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