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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 21 — Nov. 1, 2008
  • pp: 2556–2558

Real time en face Fourier-domain optical coherence tomography with direct hardware frequency demodulation

Benjamin R. Biedermann, Wolfgang Wieser, Christoph M. Eigenwillig, Gesa Palte, Desmond C. Adler, Vivek J. Srinivasan, James G. Fujimoto, and Robert Huber  »View Author Affiliations


Optics Letters, Vol. 33, Issue 21, pp. 2556-2558 (2008)
http://dx.doi.org/10.1364/OL.33.002556


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Abstract

We demonstrate en face swept source optical coherence tomography (ss-OCT) without requiring a Fourier transformation step. The electronic optical coherence tomography (OCT) interference signal from a k-space linear Fourier domain mode-locked laser is mixed with an adjustable local oscillator, yielding the analytic reflectance signal from one image depth for each frequency sweep of the laser. Furthermore, a method for arbitrarily shaping the spectral intensity profile of the laser is presented, without requiring the step of numerical apodization. In combination, these two techniques enable sampling of the in-phase and quadrature signal with a slow analog-to-digital converter and allow for real-time display of en face projections even for highest axial scan rates. Image data generated with this technique is compared to en face images extracted from a three-dimensional OCT data set. This technique can allow for real-time visualization of arbitrarily oriented en face planes for the purpose of alignment, registration, or operator-guided survey scans while simultaneously maintaining the full capability of high-speed volumetric ss-OCT functionality.

© 2008 Optical Society of America

OCIS Codes
(110.1650) Imaging systems : Coherence imaging
(110.4500) Imaging systems : Optical coherence tomography
(110.6880) Imaging systems : Three-dimensional image acquisition
(140.3600) Lasers and laser optics : Lasers, tunable
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: July 1, 2008
Revised Manuscript: September 18, 2008
Manuscript Accepted: September 22, 2008
Published: October 30, 2008

Virtual Issues
Vol. 4, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Benjamin R. Biedermann, Wolfgang Wieser, Christoph M. Eigenwillig, Gesa Palte, Desmond C. Adler, Vivek J. Srinivasan, James G. Fujimoto, and Robert Huber, "Real time en face Fourier-domain optical coherence tomography with direct hardware frequency demodulation," Opt. Lett. 33, 2556-2558 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-21-2556


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