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Applied Optics

Applied Optics


  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 35 — Dec. 10, 2005
  • pp: 7630–7634

Suppression of nonlinear frequency sweep in an optical frequency-domain reflectometer by use of Hilbert transformation

Tae-Jung Ahn, Ji Yong Lee, and Dug Young Kim  »View Author Affiliations

Applied Optics, Vol. 44, Issue 35, pp. 7630-7634 (2005)

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A compensation technique for reducing the effect of nonlinear optical frequency swept in an optical frequency-domain reflectometer (OFDR) is proposed. The instantaneous sweep optical frequency of an OFDR laser source is directly obtained by analysis of the interference signal from an auxiliary interferometer with a Hilbert transformation. Beating OFDR data from a main interferometer are regenerated with respect to the measured instantaneous optical frequency. We show that this technique dramatically improves the spatial resolution of a conventional OFDR and can be applied to an optical frequency-domain medical imaging system to eliminate the problem of a nonlinear frequency sweep effect.

© 2005 Optical Society of America

OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:

Original Manuscript: June 6, 2005
Revised Manuscript: July 26, 2005
Manuscript Accepted: July 29, 2005
Published: December 10, 2005

Virtual Issues
Vol. 1, Iss. 1 Virtual Journal for Biomedical Optics

Tae-Jung Ahn, Ji Yong Lee, and Dug Young Kim, "Suppression of nonlinear frequency sweep in an optical frequency-domain reflectometer by use of Hilbert transformation," Appl. Opt. 44, 7630-7634 (2005)

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