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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 31 — Nov. 1, 2001
  • pp: 5787–5790

Stable carrier generation and phase-resolved digital data processing in optical coherence tomography

Johannes F. de Boer, Christopher E. Saxer, and J. Stuart Nelson  »View Author Affiliations


Applied Optics, Vol. 40, Issue 31, pp. 5787-5790 (2001)
http://dx.doi.org/10.1364/AO.40.005787


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Abstract

We present a technique for improved carrier generation by eliminating the instability of a mechanical device in favor of an electro-optical phase modulator in the reference arm of an optical coherence tomography system. A greater than threefold reduction in the phase variance between consecutive A-line scans at a repetition rate of 1 kHz was achieved. Stable and reproducible interference fringe generation permits phase-resolved digital data processing. A correction algorithm was applied to the interferometric signal to compensate for the departure of the source spectrum from an ideal Gaussian shape, resulting in up to 8-dB sidelobe suppression at the expense of a 1-dB increase in the noise floor. In addition, we could eliminate completely the broadening effect of group-delay dispersion on the coherence function by introducing a quadratic phase shift in the Fourier domain of the interferometric signal.

© 2001 Optical Society of America

OCIS Codes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.3010) Medical optics and biotechnology : Image reconstruction techniques
(170.4500) Medical optics and biotechnology : Optical coherence tomography

History
Original Manuscript: February 13, 2001
Published: November 1, 2001

Citation
Johannes F. de Boer, Christopher E. Saxer, and J. Stuart Nelson, "Stable carrier generation and phase-resolved digital data processing in optical coherence tomography," Appl. Opt. 40, 5787-5790 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-31-5787

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