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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 19 — Jul. 1, 2005
  • pp: 4009–4022

Dispersion control with a Fourier-domain optical delay line in a fiber-optic imaging interferometer

Kye-Sung Lee, A. Ceyhun Akcay, Tony Delemos, Eric Clarkson, and Jannick P. Rolland  »View Author Affiliations


Applied Optics, Vol. 44, Issue 19, pp. 4009-4022 (2005)
http://dx.doi.org/10.1364/AO.44.004009


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Abstract

Recently, Fourier-domain (FD) optical delay lines (ODLs) were introduced for high-speed scanning and dispersion compensation in imaging interferometry. We investigate the effect of first- and second-order dispersion on the photocurrent signal associated with an optical coherence imaging system implemented with a single-mode fiber, a superluminescent diode centered at 950 nm ± 35 nm, a FD ODL, a mirror, and a layered LiTAO3 that has suitable dispersion characteristics to model a skin specimen. We present a practical and useful method to minimize the effect of dispersion through the interferometer and the specimen combined, as well as to quantify the results using two general metrics for resolution. Theoretical and associated experimental results show that, under the optimum solution, the maximum broadening of the point-spread function through a 1-mm-deep specimen is limited to 57% of its original rms width value (i.e., 8.1 µm optimal, 12.7 µm at maximum broadening) compared with approximately 110% when compensation is performed without the specimen taken into account.

© 2005 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.0110) Medical optics and biotechnology : Imaging systems
(170.4500) Medical optics and biotechnology : Optical coherence tomography

History
Original Manuscript: May 11, 2004
Revised Manuscript: October 29, 2004
Manuscript Accepted: December 2, 2004
Published: July 1, 2005

Citation
Kye-Sung Lee, A. Ceyhun Akcay, Tony Delemos, Eric Clarkson, and Jannick P. Rolland, "Dispersion control with a Fourier-domain optical delay line in a fiber-optic imaging interferometer," Appl. Opt. 44, 4009-4022 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-19-4009


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