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One-dimensional ultrasound receive array using spectrally encoded optical detection
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10.1063/1.1835000
/content/aip/journal/apl/85/24/10.1063/1.1835000
http://aip.metastore.ingenta.com/content/aip/journal/apl/85/24/10.1063/1.1835000
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Spectral encoding of the broadband laser. A diffraction grating disperses the laser light, where different wavelengths probe distinct positions on the acoustic sensing surface.

Image of FIG. 2.
FIG. 2.

Sagnac interferometer. (a) The QWP and FR provide the phase bias required for proper operation. The ultrasonic signals from all the receive elements are carried by the same optical fiber. (b) Possible light paths in the interferometer.

Image of FIG. 3.
FIG. 3.

Acoustic signals measured with spectral encoding. (a) Wavefield plot and (b) beam plot of the transducer focus at the center of the array. (c) Wavefield plot and (d) beam plot of the transducer focus shifted by 250 μm. For comparison, the beam plot from (b) is shown by the dashed curve in (d).

Image of FIG. 4.
FIG. 4.

Acoustic signals measured without spectral encoding. A single point detector is scanned across the pellicle. (a) Wavefield plot and (b) beam plot of the transducer focus. For comparison, the beam plot from the spectrally encoded data is shown by the dashed curve in (b).

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/content/aip/journal/apl/85/24/10.1063/1.1835000
2004-12-09
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: One-dimensional ultrasound receive array using spectrally encoded optical detection
http://aip.metastore.ingenta.com/content/aip/journal/apl/85/24/10.1063/1.1835000
10.1063/1.1835000
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