Abstract

We describe a dual-channel optical low-coherence reflectometer for accurate measurement of Doppler angles in highly scattering media. Accurate fluid-flow velocity estimation requires measurement of the Doppler shift and angle. Estimated values of the Doppler angle and average fluid-flow velocity from experimental data are in good agreement with preset values.

© 2000 Optical Society of America

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References

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2000

1998

1997

1996

M. Giarré, B. Dousse, and J.-J. Mesiter, Ultrasound Med. Biol. 22, 75 (1996).
[CrossRef]

1995

1992

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Starr, and M. J. C. van Gemert, Lasers Biol. Med. 12, 510 (1992).

Bouma, B. E.

Chan, K. P.

Chen, Z.

Davé, D.

Davé, D. P.

Devaraj, B.

Dousse, B.

M. Giarré, B. Dousse, and J.-J. Mesiter, Ultrasound Med. Biol. 22, 75 (1996).
[CrossRef]

Flock, S. T.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Starr, and M. J. C. van Gemert, Lasers Biol. Med. 12, 510 (1992).

Fujimoto, J. G.

Giarré, M.

M. Giarré, B. Dousse, and J.-J. Mesiter, Ultrasound Med. Biol. 22, 75 (1996).
[CrossRef]

Inaba, H.

Izatt, J. A.

M. D. Kulkarni, T. G. van Leeuwen, S. Yazdanfar, and J. A. Izatt, Opt. Lett. 23, 1057 (1998).
[CrossRef]

J. A. Izatt and M. D. Kulkarni, in Conference on Lasers and Electro-Optics, Vol. 9 of 1996 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1996), postdeadline paper CPD3-1.

Jacques, S. L.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Starr, and M. J. C. van Gemert, Lasers Biol. Med. 12, 510 (1992).

Kulkarni, M. D.

M. D. Kulkarni, T. G. van Leeuwen, S. Yazdanfar, and J. A. Izatt, Opt. Lett. 23, 1057 (1998).
[CrossRef]

J. A. Izatt and M. D. Kulkarni, in Conference on Lasers and Electro-Optics, Vol. 9 of 1996 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1996), postdeadline paper CPD3-1.

Mesiter, J.-J.

M. Giarré, B. Dousse, and J.-J. Mesiter, Ultrasound Med. Biol. 22, 75 (1996).
[CrossRef]

Milner, T. E.

Nelson, J. S.

Starr, W. M.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Starr, and M. J. C. van Gemert, Lasers Biol. Med. 12, 510 (1992).

Tearney, G. J.

van Gemert, M. J. C.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Starr, and M. J. C. van Gemert, Lasers Biol. Med. 12, 510 (1992).

van Leeuwen, T. G.

Wang, X. J.

Wilson, B. C.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Starr, and M. J. C. van Gemert, Lasers Biol. Med. 12, 510 (1992).

Yamada, M.

Yazdanfar, S.

Lasers Biol. Med.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Starr, and M. J. C. van Gemert, Lasers Biol. Med. 12, 510 (1992).

Opt. Lett.

Ultrasound Med. Biol.

M. Giarré, B. Dousse, and J.-J. Mesiter, Ultrasound Med. Biol. 22, 75 (1996).
[CrossRef]

Other

J. A. Izatt and M. D. Kulkarni, in Conference on Lasers and Electro-Optics, Vol. 9 of 1996 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1996), postdeadline paper CPD3-1.

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Figures (3)

Fig. 1
Fig. 1

Schematic of the system: D1, D2, detectors.

Fig. 2
Fig. 2

Optical setup in the sample path.

Fig. 3
Fig. 3

Doppler shift as a function of depth in channel 1 (circles) and channel 2 (diamonds) owing to flowing Intralipid solution in a glass capillary. For (b) and (d) the capillary tube was immersed in 1% Intralipid solution. The dotted–dashed curves in each figure are the parabolic fits to the measured data.

Tables (1)

Tables Icon

Table 1 Estimated Doppler Angles and Average Flow Velocity in a Highly Scattering Medium

Equations (4)

Equations on this page are rendered with MathJax. Learn more.

Δf1,2=12πk1,2s-k1,2i·V,
α1=arctantan θ-Δf2Δf1 sin θ,
α2=π-θ-α1,
V=Δf1,2λ2 cos α1,2.

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