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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 6 — May. 26, 2009

Contrast improvement in Fourier-domain optical coherence tomography through time gating

Matthew S. Muller and James M. Fraser  »View Author Affiliations


JOSA A, Vol. 26, Issue 4, pp. 969-976 (2009)
http://dx.doi.org/10.1364/JOSAA.26.000969


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Abstract

Time-gated (TG) Fourier-domain optical coherence tomography (FDOCT) exploits interferometric imaging with incoherent gating to filter out unwanted backreflections and improve contrast. The system uses sum-frequency generation with a variable length optical pulse as a “time gate” to restrict the depth field of view of backscattered light to 84 176 μ m (−20 dB points). The imaging bandwidth is upconverted from the IR (1280 nm) to visible (504 nm), which allows the use of sensitive silicon-based detection technology, prior to standard FDOCT processing. The TG system achieves a maximum sensitivity of 88 dB, and a contrast enhancement of 29 dB is shown over a standard IR FDOCT system. Imaging of a highly scattering medium (onion skin) is also demonstrated.

© 2009 Optical Society of America

OCIS Codes
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing
(110.4500) Imaging systems : Optical coherence tomography

ToC Category:
Imaging Systems

History
Original Manuscript: October 13, 2008
Manuscript Accepted: February 3, 2009
Published: March 24, 2009

Virtual Issues
Vol. 4, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Matthew S. Muller and James M. Fraser, "Contrast improvement in Fourier-domain optical coherence tomography through time gating," J. Opt. Soc. Am. A 26, 969-976 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-26-4-969

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