Adaptive optical array receivers for detection of surface acoustic waves

Todd W. Murray, Hemmo Tuovinen, Sridhar Krishnaswamy

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Adaptive interferometric detection systems based on two-wave mixing in photorefractive crystals have been configured as distributed optical receivers. The spatial distribution of the detection laser power on the sample surface is controlled by use of phase gratings and amplitude masks. The responses of point, line, array, and chirped optical receivers to propagating surface acoustic waves (SAW’s) are discussed theoretically and demonstrated experimentally. It is shown that by use of different object beam footprints it is possible to configure adaptive holographic SAW receivers that are either broadband or narrow band and that are preferentially sensitive to SAW’s propagating in given directions. The receivers also allow for the distribution of laser power over the sample, eliminating the excessive heating or surface damage that can occur in some materials when high power, point-focused, detection lasers are used.

Original languageEnglish (US)
Pages (from-to)3276-3284
Number of pages9
JournalApplied optics
Volume39
Issue number19
DOIs
StatePublished - Jul 1 2000

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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