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

McDowell, Emily J. and Sarunic, Marinko V. and Yaqoob, Zahid and Yang, Changhuei (2007) SNR enhancement through phase dependent signal reconstruction algorithms for phase separated interferometric signals. Optics Express, 15 (16). pp. 10103-10122. ISSN 1094-4087. https://resolver.caltech.edu/CaltechAUTHORS:MCDoe07b

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Abstract

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 3x3 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.


Item Type:Article
Related URLs:
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http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-16-10103OtherUNSPECIFIED
Additional Information:© 2007 Optical Society of America Original Manuscript: June 19, 2007; Manuscript Accepted: July 24, 2007; Revised Manuscript: July 20, 2007; Published: July 26, 2007. This work was supported by a NSF Career Award, BES-0547657. E.J. McDowell acknowledges support from an NIH Ruth L. Kirschtein NRSA fellowship, EB006694.
Funders:
Funding AgencyGrant Number
NSFBES-0547657
NIH Predoctoral FellowshipEB006694
Subject Keywords:Optical coherence tomography; Noise in imaging systems
Issue or Number:16
Record Number:CaltechAUTHORS:MCDoe07b
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:MCDoe07b
Official Citation:E. J. McDowell, M. V. Sarunic, Z. Yaqoob, and C. Yang, "SNR enhancement through phase dependent signal reconstruction algorithms for phase separated interferometric signals," Opt. Express 15, 10103-10122 (2007) http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-16-10103
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8283
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:01 Aug 2007
Last Modified:02 Oct 2019 23:49

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