Bragg imaging of profiled ultrasound using focused laser beams

S. Vanaverbeke; Oswald Jozef Leroy

doi:10.1117/12.447600

6 November 2001 Bragg imaging of profiled ultrasound using focused laser beams

S. Vanaverbeke, Oswald Jozef Leroy

Proceedings Volume 4514, Acousto-Optics and Applications IV; (2001) https://doi.org/10.1117/12.447600
Event: Acousto-Optics and Applications IV, 2001, Gdansk-Jurata, Poland

Abstract

A model is presented for the acousto-optic interaction of a focused Gaussian laser beam with a profiled sound column in the Bragg regime. Expressions for the spectral distribution of the first diffraction orders are derived on the basis of a successive approximation method originally introduced by Aggarwal to study plane light wave diffraction by continuous plane ultrasonic waves [Proc. Ind. Acad. Sci. Sec. A 31, 417 (1950)]. It is shown that sharp images of the sound field in the first diffraction orders only occur in the focal plane of the laser beam after the sound column. The quality of the resulting images is investigated as a function of the initial beamwidth of the laser, the focal distance and the distance of the focusing lens from the sound column.

Citation Download Citation

S. Vanaverbeke and Oswald Jozef Leroy "Bragg imaging of profiled ultrasound using focused laser beams", Proc. SPIE 4514, Acousto-Optics and Applications IV, (6 November 2001); https://doi.org/10.1117/12.447600

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KEYWORDS

Diffraction

Ultrasonics

Acousto-optics

Chlorine

Refractive index

Ultrasonography

Laser beam propagation

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