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Proceedings Paper

Temporal modulation of light in complex acousto-optic arrangements explained by phase-vector analysis
Author(s): Italo Gabrielli
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Paper Abstract

The principles of the phase-vector analysis are recalled by transparencies showing elementary linear and sinusoidal diffracting agents. More complex acousto-optic systems are then analyzed which produce temporal modulated diffraction fringes. They are, in addition to a stationary field of stationary US waves: A) Two adjacent US beams propagating in opposite directions, with their frequencies in ratio 2/3. B) Two adjacent US beams of the same wavelength, propagating in two liquids with velocities in mutual ratio 3/2. C) One US beam of wavelength (Lambda) adjacent to an amplitude grating of constant K equals (Lambda) /3. D) One US beam adjacent to a phase grating of the same wavelength. The predictions are presented by plots reporting, as a function of time, the evolution of the amplitude and of the vector-angle of the light diffraction to a single fringe in the far-field. When the light vector-angle shows, in addition to the Doppler shift, frequency modulation, an additional plot shows such deviations from a linear angular evolution. Unattended predictions are presented, and their experimental verification is advised. The lecture is integrated by a videocassette, reporting the argument by animations.

Paper Details

Date Published: 11 November 1998
PDF: 12 pages
Proc. SPIE 3581, Acousto-Optics and Applications III, (11 November 1998); doi: 10.1117/12.330509
Show Author Affiliations
Italo Gabrielli, Univ. degli Studi di Trieste (Italy)

Published in SPIE Proceedings Vol. 3581:
Acousto-Optics and Applications III
Antoni Sliwinski; Bogumil B. J. Linde; Piotr Kwiek, Editor(s)

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