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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 17938–17951

Optical-domain subsampling for data efficient depth ranging in Fourier-domain optical coherence tomography

Meena Siddiqui and Benjamin J. Vakoc  »View Author Affiliations

Optics Express, Vol. 20, Issue 16, pp. 17938-17951 (2012)

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Recent advances in optical coherence tomography (OCT) have led to higher-speed sources that support imaging over longer depth ranges. Limitations in the bandwidth of state-of-the-art acquisition electronics, however, prevent adoption of these advances into the clinical applications. Here, we introduce optical-domain subsampling as a method for imaging at high-speeds and over extended depth ranges but with a lower acquisition bandwidth than that required using conventional approaches. Optically subsampled laser sources utilize a discrete set of wavelengths to alias fringe signals along an extended depth range into a bandwidth limited frequency window. By detecting the complex fringe signals and under the assumption of a depth-constrained signal, optical-domain subsampling enables recovery of the depth-resolved scattering signal without overlapping artifacts from this bandwidth-limited window. We highlight key principles behind optical-domain subsampled imaging, and demonstrate this principle experimentally using a polygon-filter based swept-source laser that includes an intra-cavity Fabry-Perot (FP) etalon.

© 2012 OSA

OCIS Codes
(140.3460) Lasers and laser optics : Lasers
(170.4500) Medical optics and biotechnology : Optical coherence tomography

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: March 19, 2012
Revised Manuscript: June 5, 2012
Manuscript Accepted: June 7, 2012
Published: July 23, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

Meena Siddiqui and Benjamin J. Vakoc, "Optical-domain subsampling for data efficient depth ranging in Fourier-domain optical coherence tomography," Opt. Express 20, 17938-17951 (2012)

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