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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 16 — Aug. 6, 2007
  • pp: 10103–10122

SNR enhancement through phase dependent signal reconstruction algorithms for phase separated interferometric signals

Emily J. McDowell, Marinko V. Sarunic, Zahid Yaqoob, and Changhuei Yang  »View Author Affiliations

Optics Express, Vol. 15, Issue 16, pp. 10103-10122 (2007)

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We report several signal reconstruction algorithms for processing phase separated homodyne interferometric signals. Methods that take advantage of the phase of the signal are experimentally shown to achieve a signal-to-noise ratio (SNR) improvement of up to 5 dB over commonly used algorithms. To begin, we present a derivation of the SNR resulting from five image reconstruction algorithms in the context of a 3×3 fiber-coupler based homodyne optical coherence tomography (OCT) system, and clearly show the improvement in SNR associated with phase-based algorithms. Finally, we experimentally verify this improvement and demonstrate the enhancement in contrast and improved image quality afforded by these algorithms through homodyne OCT imaging of a Xenopus laevis tadpole. These algorithms can be generally applied in signal extraction processing where multiple phase separated measurements are available.

© 2007 Optical Society of America

OCIS Codes
(110.4280) Imaging systems : Noise in imaging systems
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography

ToC Category:
Imaging Systems

Original Manuscript: June 19, 2007
Revised Manuscript: July 20, 2007
Manuscript Accepted: July 24, 2007
Published: July 26, 2007

Virtual Issues
Vol. 2, Iss. 9 Virtual Journal for Biomedical Optics

Emily J. McDowell, Marinko V. Sarunic, Zahid Yaqoob, and Changhuei Yang, "SNR enhancement through phase dependent signal reconstruction algorithms for phase separated interferometric signals," Opt. Express 15, 10103-10122 (2007)

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