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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 8 — Mar. 10, 2008
  • pp: 1082–1089

One- and two-dimensional single-mode differential fiber-optic displacement sensor for submillimeter measurements

Vincent Trudel and Yves St-Amant  »View Author Affiliations

Applied Optics, Vol. 47, Issue 8, pp. 1082-1089 (2008)

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Using the overlap integral method and the Gaussian approximation for the single-mode fiber-optic field, the working principle of one- and two-dimensional differential fiber-optic displacement sensors for submillimeter measurements is demonstrated. The sensors consist of one emitting fiber and two or three receiving fibers, respectively, for the one- and two-dimensional sensors. Sensor responses are intrinsically linear over a wide range of travels. Moreover, for the two-dimensional sensor, each axis of displacement can be measured independently. Sensor responses are simulated experimentally using a highly precise robot. Linearity, travel, and sensitivity are characterized for the different gap distance between the emitting and receiving fibers. A design chart that includes nonlinearity error, travel, sensitivity, and gap is finally proposed.

© 2008 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: July 2, 2007
Revised Manuscript: January 4, 2008
Manuscript Accepted: January 10, 2008
Published: March 7, 2008

Vincent Trudel and Yves St-Amant, "One- and two-dimensional single-mode differential fiber-optic displacement sensor for submillimeter measurements," Appl. Opt. 47, 1082-1089 (2008)

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