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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 22, Iss. 12 — Dec. 1, 2005
  • pp: 2786–2798

Fabry–Perot metrology for displacements up to 50 mm

John R. Lawall  »View Author Affiliations


JOSA A, Vol. 22, Issue 12, pp. 2786-2798 (2005)
http://dx.doi.org/10.1364/JOSAA.22.002786


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Abstract

A system designed to apply Fabry–Perot interferometry to the measurement of displacements is described. Two adjacent modes of a Fabry–Perot cavity are probed, and both the absolute optical frequencies and their difference are used to determine displacements via changes in cavity length. Light is coupled to the cavity via an optical fiber, making the system ideal for remote sensing applications. Continuous interrogation is not necessary, as the cavity length is encoded in the free spectral range. The absolute uncertainty is determined to be below 10 pm , which for the largest displacement measured corresponds to a relative uncertainty of 4 × 10 10 . To my knowledge this is the smallest relative uncertainty in a displacement measurement ever demonstrated.

© 2005 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: February 4, 2005
Revised Manuscript: April 28, 2005
Manuscript Accepted: May 11, 2005
Published: December 1, 2005

Citation
John R. Lawall, "Fabry–Perot metrology for displacements up to 50 mm," J. Opt. Soc. Am. A 22, 2786-2798 (2005)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-22-12-2786


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