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

Tae Jung Ahn, Ji Yong Lee, Dug Young Kim

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)7630-7634
Number of pages5
JournalApplied Optics
Volume44
Issue number35
DOIs
Publication statusPublished - 2005 Dec 10

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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