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Instantaneous signal-to-noise ratio of time-domain optical coherence tomography

Sherif, S.S., Rosa, C.C., Podoleanu, Adrian G.H. (2005) Instantaneous signal-to-noise ratio of time-domain optical coherence tomography. In: European Conference on Biomedical Optics. Optics InfoBase Conference Papers. . Optical Society of America ISBN 0-8194-5863-5. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
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Abstract

We model the photocurrent of a depth-scan (A-scan) from an optical coherence tomography (OCT) system, using a linearly polarized thermal source, as an electronically filtered doubly-stochastic Poisson process, and we obtain its timevarying second-order statistics. We derive an expression for the instantaneous signal-to-noise ratio (SNR) of timedomain OCT which is more general than the previously reported time-averaged expressions. Unlike previous work, our analysis combines shot noise, due to detection of coherent light, and photon excess noise, due to fluctuations in the optical field, into a single noise source that we refer to as the photoelectron noise. Similar to previous results, our SNR is dominated by a term similar to shot-noise when the reference optical power is low and by a term similar to photon excess noise when the reference power is high. © 2005 Optical Society of America.

Item Type: Conference or workshop item (Proceeding)
Uncontrolled keywords: Optical coherence tomography, Shot noise, Statistical optics, Photons, Shot noise, Signal to noise ratio, Statistical optics, Stochastic models, Linearly polarized, Optical power, Photoelectron noise, Poisson process, Second order statistics, Signaltonoise ratio (SNR), Thermal source, Time-averaged, Optical tomography
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 24 Jul 2015 15:42 UTC
Last Modified: 29 May 2019 14:55 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49773 (The current URI for this page, for reference purposes)
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