Detection of acoustic second harmonics in solids using a heterodyne laser interferometer

Download
  1. (PDF, 1 MB)
  2. Get@NRC: Detection of acoustic second harmonics in solids using a heterodyne laser interferometer (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1121/1.413240
AuthorSearch for:
TypeArticle
Journal titleJournal of the Acoustical Society of America
ISSN0001-4966
Volume98
Issue5
Pages27452752; # of pages: 8
Subjectinterferometers; heterodyne detectors; acoustical measurements; sample handling; acoustic sensing
AbstractAcoustic second harmonic generation in solids is difficult to measure and often requires careful sample preparation. In this paper, a heterodyneinterferometer modified to measure acoustic fundamental and second harmonics is presented. It requires relatively little sample preparation and it provides noncontact, wideband, absolute, and pointlike measurements. It is shown that the output of an ideal heterodyneinterferometer does not contain any even harmonics of a single-frequency acoustic signal. Odd harmonics, however, are produced in calculable amounts. A detailed model of the interferometer is introduced to account for various sources of spurious second harmonics and the model is experimentally verified. Three methods of calibration for the absolute measurement of surface displacement are presented. Measurements of the nonlinearity parameter, β, of a fused quartz sample are shown to agree with literature values.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NPARC number21273062
Export citationExport as RIS
Report a correctionReport a correction
Record identifiercb3b7d6a-2ba2-4a0e-88d9-b2151f18cb2a
Record created2014-12-11
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)