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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 5 — Feb. 10, 2008
  • pp: 687–693

Inherent homogenous media dispersion compensation in frequency domain optical coherence tomography by accurate k -sampling

Alexandre R. Tumlinson, Bernd Hofer, Amy M. Winkler, Boris Považay, Wolfgang Drexler, and Jennifer K. Barton  »View Author Affiliations


Applied Optics, Vol. 47, Issue 5, pp. 687-693 (2008)
http://dx.doi.org/10.1364/AO.47.000687


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Abstract

Depth dependent broadening of the axial point spread function due to dispersion in the imaged media, and algorithms for postprocess correction, have been previously described for both time domain and frequency domain optical coherence tomography. We show that homogeneous media dispersion artifacts disappear when frequency domain samples are acquired with uniform spacing in circular wavenumber, as opposed to uniform sampling in optical frequency. We further explicate the source of this point spread broadening and simulate its magnitude in aqueous media. We experimentally demonstrate media dispersion compensation in high dispersion glass by choosing sample frequencies at equal intervals of media index of refraction divided by vacuum wavelength, and we recover unbroadened reflections without an additional postprocessing step.

© 2008 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(260.2030) Physical optics : Dispersion
(070.2025) Fourier optics and signal processing : Discrete optical signal processing

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: July 16, 2007
Manuscript Accepted: October 31, 2007
Published: February 7, 2008

Virtual Issues
Vol. 3, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Alexandre R. Tumlinson, Bernd Hofer, Amy M. Winkler, Boris Považay, Wolfgang Drexler, and Jennifer K. Barton, "Inherent homogenous media dispersion compensation in frequency domain optical coherence tomography by accurate k-sampling," Appl. Opt. 47, 687-693 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-5-687

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