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A generalized noise variance analysis model and its application to the characterization of 1/f noise

McDowell, Emily J. and Cui, Xiquan and Yaqoob, Zahid and Yang, Changhuei (2007) A generalized noise variance analysis model and its application to the characterization of 1/f noise. Optics Express, 15 (7). pp. 3833-3848. ISSN 1094-4087. http://resolver.caltech.edu/CaltechAUTHORS:MCDoe07a

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Abstract

We present a novel generalized model for the analysis of noise with a known spectral density. This model is particularly appropriate for the analysis of noise with a 1/f^a distribution in a homodyne interferometer. The noise model reveals that, for α>1, 1/f^a noise significantly impacts the homodyne signal-to-noise ratio (SNR) for integration times that near a characteristic time, beyond which the SNR will no longer significantly improve with increasing integration time. We experimentally verify our theoretical findings with a set of experiments employing a quadrature homodyne optical coherence tomography (OCT) system, finding good agreement. The characteristic integration time is measured to be approximately 2 ms for our system. Additionally, we find that the 1/f noise characteristics, including the exponent, α, as well as the characteristic integration time, are system and photodetector dependent.


Item Type:Article
Additional Information:© 2007 Optical Society of America Received 18 December 2006; revised 13 March 2007; accepted 13 March 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:7
Record Number:CaltechAUTHORS:MCDoe07a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:MCDoe07a
Alternative URL:http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-7-3833
Official Citation:E. J. McDowell, X. Cui, Z. Yaqoob, and C. Yang, "A generalized noise variance analysis model and its application to the characterization of 1/f noise," Opt. Express 15, 3833-3848 (2007) http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-7-3833
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8104
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:30 Jul 2007
Last Modified:13 Mar 2017 21:45

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