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Proceedings Paper

Increasing signal-to-noise ratio of swept-source optical coherence tomography by oversampling in k-space
Author(s): Karim Nagib; Biniyam Mezgebo; Rahul Thakur; Namal Fernando; Behzad Kordi; Sherif Sherif
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Paper Abstract

Optical coherence tomography systems suffer from noise that could reduce ability to interpret reconstructed images correctly. We describe a method to increase the signal-to-noise ratio of swept-source optical coherence tomography (SSOCT) using oversampling in k-space. Due to this oversampling, information redundancy would be introduced in the measured interferogram that could be used to reduce white noise in the reconstructed A-scan. We applied our novel scaled nonuniform discrete Fourier transform to oversampled SS-OCT interferograms to reconstruct images of a salamander egg. The peak-signal-to-noise (PSNR) between the reconstructed images using interferograms sampled at 250MS/s andz50MS/s demonstrate that this oversampling increased the signal-to-noise ratio by 25.22 dB.

Paper Details

Date Published: 5 March 2018
PDF: 4 pages
Proc. SPIE 10591, 2nd Canterbury Conference on OCT with Emphasis on Broadband Optical Sources, 105910R (5 March 2018); doi: 10.1117/12.2283015
Show Author Affiliations
Karim Nagib, Univ. of Manitoba (Canada)
Biniyam Mezgebo, Univ. of Manitoba (Canada)
Rahul Thakur, Univ. of Manitoba (Canada)
Namal Fernando, Manitoba Hydro (Canada)
Behzad Kordi, Univ. of Manitoba (Canada)
Sherif Sherif, Univ. of Manitoba (Canada)


Published in SPIE Proceedings Vol. 10591:
2nd Canterbury Conference on OCT with Emphasis on Broadband Optical Sources
Adrian Podoleanu; Ole Bang, Editor(s)

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