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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Stephen A. Burns
  • Vol. 26, Iss. 4 — Apr. 1, 2009
  • pp: 723–731

Evaluation of effective noise bandwidth for broadband optical coherence tomography operation

Ramona Cernat, George M. Dobre, Adrian Bradu, and Adrian Gh. Podoleanu  »View Author Affiliations

JOSA A, Vol. 26, Issue 4, pp. 723-731 (2009)

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Key noise parameters in optical coherence tomography (OCT) systems employing splitters with a nonflat spectral response are evaluated using a supercontinuum fiber laser source with a spectrum of 450 nm 1700 nm and a time domain OCT architecture based on 1300 nm fiber splitters. The spectral behavior of the splitter leading to balanced detection is measured over a range of 300 nm . Because of spectrally different signals at the balanced detector input a residual excess photon noise term results. A rigorous treatment of this noise term [ Appl. Opt. 43, 4802 (2004) ] introduced two new quantities that take into account the spectral properties of the coupler. In this report, we have evaluated these two noise bandwidth quantities and comparatively assessed the noise behavior predicted by the classical theory with the theory based on the two new noise bandwidths. We show that under certain operating parameters, the additional excess photon noise is twice that predicted for a coupler with a flat spectral response.

© 2009 Optical Society of America

OCIS Codes
(030.4280) Coherence and statistical optics : Noise in imaging systems
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(110.4500) Imaging systems : Optical coherence tomography
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(230.0230) Optical devices : Optical devices

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: September 16, 2008
Revised Manuscript: January 23, 2009
Manuscript Accepted: February 2, 2009
Published: March 5, 2009

Virtual Issues
Vol. 4, Iss. 6 Virtual Journal for Biomedical Optics

Ramona Cernat, George M. Dobre, Adrian Bradu, and Adrian Gh. Podoleanu, "Evaluation of effective noise bandwidth for broadband optical coherence tomography operation," J. Opt. Soc. Am. A 26, 723-731 (2009)

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