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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 16, Iss. 6 — Jun. 1, 1999
  • pp: 1395–1401

Spatial coherence property of a laser beam during acousto-optic diffraction

Chen-Wen Tarn  »View Author Affiliations

JOSA A, Vol. 16, Issue 6, pp. 1395-1401 (1999)

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The spatial coherence property of a partially coherent light during the Bragg acousto-optic interaction is investigated. Starting from the wave equation, four coupled, parabolic equations that can describe the evolution and the propagation of mutual intensity functions of the diffracted light during the acousto-optic interaction are derived. A partially coherent light beam with arbitrary spatial profile and complex degree of spatial coherence is assumed to be incident on the Bragg acousto-optic cell. With the use of a statistical theory of linear systems, a general formalism of angular-correlation functions for zero-order and minus-one-order light can be derived. The corresponding mutual intensity and complex coherence factor functions are hence implemented numerically. From the solutions one can note that, through the acousto-optic interaction, the degrees of spatial coherence of the diffracted light beams are controllable by the intensity and the frequency of the sound wave.

© 1999 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(070.1060) Fourier optics and signal processing : Acousto-optical signal processing
(230.1040) Optical devices : Acousto-optical devices

Original Manuscript: August 4, 1998
Revised Manuscript: January 6, 1999
Manuscript Accepted: January 11, 1999
Published: June 1, 1999

Chen-Wen Tarn, "Spatial coherence property of a laser beam during acousto-optic diffraction," J. Opt. Soc. Am. A 16, 1395-1401 (1999)

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