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Determination of the surface wave dispersion of a coating excited by laser

  • Xue Hang Song
  • , Yong Dong Pan*
  • , Zheng Zhong
  • *Corresponding author for this work
  • Tongji University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A detailed study is undertaken to analyze the dispersion characteristics of a coating under laser excitation. The surface wave dispersion is one of its inherent properties. Two-dimensional Fourier transform is applied to convert the experiment data in the time-space domain into the frequency-wave-number domain, where the peaks form the dispersive curves. A coherent method is proposed to precisely measure the dispersive curves of coatings. The use of the phase information and magnitude spectrum makes the measurements more precise and stable than traditional non-coherent methods. Additionally, storage depth of oscilloscope affects the precision of dispersion curves. The technique of obtaining the dispersive curves with high precision is an efficient tool to solve the inversion problem.

Original languageEnglish
Title of host publicationProceedings of the 2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2011
Pages494-497
Number of pages4
DOIs
StatePublished - 2011
Externally publishedYes
Event2011 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications, SPAWDA 2011 - Shenzhen, Guangdong, China
Duration: 9 Dec 201111 Dec 2011

Publication series

NameProceedings of the 2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2011

Conference

Conference2011 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications, SPAWDA 2011
Country/TerritoryChina
CityShenzhen, Guangdong
Period9/12/1111/12/11

Keywords

  • Coating
  • Dispersion
  • Laser
  • Phase spectrum
  • Surface wave

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