Abstract

A novel optical coherence tomography (OCT) system is presented that combines Fourier-domain OCT with incoherent nonlinear time gating. By processing backscattered light in the optical domain, the user can select a restricted depth field of view for improved contrast and acquisition speed. This technique has the additional advantage that imaging is done in the infrared (1280nm) but is detected in the visible (504nm).

© 2007 Optical Society of America

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References

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  1. M. Wojtkowski, T. Bajraszewski, P. Targowski, and A. Kowalczyk, Opt. Lett. 28, 1745 (2003).
    [CrossRef] [PubMed]
  2. H. Lim, M. Mujat, C. Kerbage, E. C. W. Lee, Y. Chen, T. C. Chen, and J. F. de Boer, Opt. Express 14, 12902 (2006).
    [CrossRef] [PubMed]
  3. C. Dunsby and P. M. W. French, J. Phys. D 36, R207 (2003).
    [CrossRef]
  4. J. Su, I. V. Tomov, Y. Jiang, and Z. Chen, Appl. Opt. 46, 1770 (2007).
    [CrossRef] [PubMed]
  5. R. W. Boyd, Nonlinear Optics, 2nd ed. (Academic, 2003).
  6. M. W. Lindner, P. Andretzky, F. Kiesewetter, and G. Häusler, in Handbook of Optical Coherence Tomography, B.E.Bouma and G.J.Tearney, eds. (Marcel Dekker, 2002), pp. 335-357.
  7. E. Götzinger, M. Pircher, R. A. Leitgeb, and C. K. Hitzenberger, Opt. Express 13, 583 (2005).
    [CrossRef] [PubMed]

2007 (1)

2006 (1)

2005 (1)

2003 (2)

Appl. Opt. (1)

J. Phys. D (1)

C. Dunsby and P. M. W. French, J. Phys. D 36, R207 (2003).
[CrossRef]

Opt. Express (2)

Opt. Lett. (1)

Other (2)

R. W. Boyd, Nonlinear Optics, 2nd ed. (Academic, 2003).

M. W. Lindner, P. Andretzky, F. Kiesewetter, and G. Häusler, in Handbook of Optical Coherence Tomography, B.E.Bouma and G.J.Tearney, eds. (Marcel Dekker, 2002), pp. 335-357.

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Figures (3)

Fig. 1
Fig. 1

Schematic setup of the time-gated FDOCT system: NL-XTAL, nonlinear crystal; EMCCD, electron-multiplying CCD; NDF, neutral density filter; HWP, half-wave plate; 4-f GP, 4-f grating pair; VIS Spect., visible spectrometer.

Fig. 2
Fig. 2

Time-gate cross-correlation attenuation profile constructed by overlaying multiple axial scans of a mirror. Inset, point-spread function of time-gated FDOCT with Gaussian fit (FWHM 8.9 μ m ).

Fig. 3
Fig. 3

13.6 dB contrast enhancement demonstrated in an axial scan of a microscope slide and mirror.

Equations (2)

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E SFG E gate exp i ( ω gate z gate c + ϕ gate ) × { E ref exp i ( ω OCT z ref c + ϕ OCT ) + E sam exp i ( ω OCT z sam c + ϕ OCT ) } ,
E SFG 2 ( E gate E ref ) 2 + ( E gate E sam ) 2 + 2 ( E gate ) 2 E ref × E sam cos ( ω OCT ( z ref z sam ) c ) .

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