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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 1 — Jan. 5, 2009
  • pp: 7–24

Dispersion encoded full range frequency domain optical coherence tomography

Bernd Hofer, Boris Považay, Boris Hermann, Angelika Unterhuber, Gerald Matz, and Wolfgang Drexler  »View Author Affiliations

Optics Express, Vol. 17, Issue 1, pp. 7-24 (2009)

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We propose an iterative algorithm that exploits the dispersion mismatch between reference and sample arm in frequency-domain optical coherence tomography (FD-OCT) to effectively cancel complex conjugate mirror terms in individual A-scans and thereby generate full range tomograms. The resulting scheme, termed dispersion encoded full range (DEFR) OCT, allows distinguishing real structures from complex conjugate mirror artifacts. Even though DEFR-OCT has higher post-processing complexity than conventional FD-OCT, acquisition speed is not compromised since no additional A-scans need to be measured, thereby rendering this technique robust against phase fluctuations. The algorithm uses numerical dispersion compensation and exhibits similar resolution as standard processing. The residual leakage of mirror terms is further reduced by incorporating additional knowledge such as the power spectrum of the light source. The suppression ratio of mirror signals is more than 50 dB and thus comparable to complex FD-OCT techniques which use multiple A-scans.

© 2009 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(100.3020) Image processing : Image reconstruction-restoration
(100.5070) Image processing : Phase retrieval
(110.4500) Imaging systems : Optical coherence tomography
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

ToC Category:
Imaging Systems

Original Manuscript: November 13, 2008
Revised Manuscript: December 17, 2008
Manuscript Accepted: December 18, 2008
Published: December 22, 2008

Virtual Issues
Vol. 4, Iss. 3 Virtual Journal for Biomedical Optics

Bernd Hofer, Boris Považay, Boris Hermann, Angelika Unterhuber, Gerald Matz, and Wolfgang Drexler, "Dispersion encoded full range frequency domain optical coherence tomography," Opt. Express 17, 7-24 (2009)

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