Experimental and theoretical examination of the phase transfer from the acoustic to optical waves during strong anisotropic Bragg diffraction in acousto-optic devices

M. Veress, P. Maák, P. Richter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The optical phase of a beam diffracted in an acousto-optic interaction may be directly controlled with the acoustic phase, but limitations occur in the case of commonly used AO devices, based on strong anisotropic AO interaction. In our study we present measurement and theoretical calculation of the phase shift of a laser beam diffracted in an AO deflector. The optical phase is a function of the acoustic and optical frequency and of the relative spatial positions of the interacting beams. We measured the phase shift with a heterodyne setup, where we measured the phase of the heterodyne signal relative to a fixed reference. We found that the phase shift introduced by the AO crystal is linear with the sound frequency, its gradient is of 10-20rad/MHz and depends mainly on the optical beam's distance from the transducer. We show that this phase shift can be derived theoretically from the momentum matching condition that must be fulfilled at each optical and acoustic frequency pair.

Original languageEnglish
Title of host publicationCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Smart Optics
PublisherTrans Tech Publications Ltd
Pages169-172
Number of pages4
ISBN (Print)9783908158127
DOIs
Publication statusPublished - Jan 1 2008
Event3rd International Conference on Smart Materials, Structures and Systems - Smart Optics, CIMTEC 2008 - Acireale, Sicily, Italy
Duration: Jun 8 2008Jun 13 2008

Publication series

NameCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Smart Optics
Volume55

Other

Other3rd International Conference on Smart Materials, Structures and Systems - Smart Optics, CIMTEC 2008
CountryItaly
CityAcireale, Sicily
Period6/8/086/13/08

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Keywords

  • Acousto optics
  • Deflector
  • Filter
  • Heterodyne phase measurement

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)

Cite this

Veress, M., Maák, P., & Richter, P. (2008). Experimental and theoretical examination of the phase transfer from the acoustic to optical waves during strong anisotropic Bragg diffraction in acousto-optic devices. In CIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Smart Optics (pp. 169-172). (CIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Smart Optics; Vol. 55). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/AST.55.169