Abstract

We present a new detection scheme for acousto-optic tomography based on pulsed-wave ultrasound and illumination combined with heterodyne parallel speckle detection. This setup can perform tomographies inside several-centimeter-thick scattering samples. Test experiments confirm the suitability of this method for performing tomographies inside various types of optically scattering media, including liquids.

© 2005 Optical Society of America

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References

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2003

2001

L.-H. Wang, Phys. Rev. Lett. 87, 043903 (2001).
[CrossRef]

2000

1999

1998

1997

1995

1994

Al-Koussa, M.

Atlan, M.

Boccara, A. C.

Collot, L.

Forget, B. C.

Genack, A. Z.

Goy, P.

Gross, M.

Jacques, S. L.

Jiao, S.-L.

Jüptner, W.

Kempe, M.

Ku, G.

Larionov, M.

Lebec, M.

LeClerc, F.

Leutz, W.

W. Leutz and G. Maret, Physica B 204, 14 (1995).
[CrossRef]

Lev, A.

Léveque, S.

Maret, G.

W. Leutz and G. Maret, Physica B 204, 14 (1995).
[CrossRef]

Ramaz, F.

Saint-Jalmes, H.

Schnars, U.

Selb, J.

Sfez, B. G.

Wang, L.-H.

Yamaguchi, I.

Yao, G.

Zaslavski, D.

Zhang, T.

Zhao, X.-M.

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Figures (6)

Fig. 1
Fig. 1

Setup: M1–M3, mirrors; transducer, acoustic emitter.

Fig. 2
Fig. 2

Stroboscopic detection of the AP (pulse length v s τ , where v s 1500 m s is the sound velocity) by the LO beam LP (pulse length c τ , where c is the light velocity). (i) AP propagates in the sample while the LO beam is turned off. (ii) AP and LP overlap within the AO volume of interest. Heterodyne amplification and detection of ultrasound-tagged photons occurs. (iii) LO beam is turned off until the next AP reaches the AO volume.

Fig. 3
Fig. 3

Left, representation of the k-space signal S ̃ ( k x , k y ) 2 . Right, summation of S ̃ ( k x , k y ) 2 over k y . Heterodyne signal (A); speckle decorrelation noise (B), (C); twin image (D); shot noise (E), (F).

Fig. 4
Fig. 4

Left, ( x , y ) tomographies ( 32 × 64 points) in a 25 - mm -thick ( z ) jellified milk slab made with 3- and 5 - μ s pulses (corresponding acoustic duty cycle of 3% and 5%, respectively). Right, normalized profiles at y = 5 mm .

Fig. 5
Fig. 5

( x , y ) tomography ( 48 × 64 points) in a 20 - mm -thick ( z ) chicken muscle, with a black-inked inclusion of the same muscle.

Fig. 6
Fig. 6

Left, AO signal along the y acoustic axis (512 points) in a 20 - mm -thick ( z ) liquid milk sample (+) with an 8 - mm black-inked inclusion of milk enclosed in a latex membrane (∙). Right, difference plot.

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