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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 19 — Oct. 1, 2007
  • pp: 2768–2770

Increased ranging depth in optical frequency domain imaging by frequency encoding

S. M. R. Motaghian Nezam, B. J. Vakoc, A. E. Desjardins, G. J. Tearney, and B. E. Bouma  »View Author Affiliations

Optics Letters, Vol. 32, Issue 19, pp. 2768-2770 (2007)

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A technique for increasing the ranging depth in optical frequency domain imaging utilizing frequency encoding is presented. Ranging depth is enhanced by using two interferometer reference arms with different path lengths and independent modulation frequencies (25 and 50 MHz ). With this configuration, the sensitivity decreases by 6 dB over a depth range of 7 mm , approximately a threefold improvement over the conventional optical frequency domain imaging technique. We demonstrate that the reference arm frequency separation, tuning speed, center wavelength, and coherence instantaneous length determine the signal-to-cross-talk ratio.

© 2007 Optical Society of America

OCIS Codes
(110.1650) Imaging systems : Coherence imaging
(110.4500) Imaging systems : Optical coherence tomography
(170.3880) Medical optics and biotechnology : Medical and biological imaging

ToC Category:
Imaging Systems

Original Manuscript: July 18, 2007
Revised Manuscript: August 17, 2007
Manuscript Accepted: August 22, 2007
Published: September 17, 2007

Virtual Issues
Vol. 2, Iss. 11 Virtual Journal for Biomedical Optics

S. M. R. Motaghian Nezam, B. J. Vakoc, A. E. Desjardins, G. J. Tearney, and B. E. Bouma, "Increased ranging depth in optical frequency domain imaging by frequency encoding," Opt. Lett. 32, 2768-2770 (2007)

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