Increasing the frequency of surface acoustic waves generated by phase velocity scanning of laser interference fringes

Harumichi Sato, Hisato Ogiso, Akira Yabe, Kazushi Yamanaka

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

To nondestructively detect surface defects that reduce the strength of ceramics and structural materials of micromachines, we previously developed the phase velocity scanning method. By using scanning interference fringes generated by two laser beams whose frequencies are shifted, the method can generate a 110 MHz surface acoustic wave (SAW). However, the frequency of the SAW depends on the frequency of the Bragg cell used, thus making the upper-limit frequency about 110 MHz. In this study, we propose multiple use of Bragg cells in series, and successfully generated a 200 MHz SAW.

Original languageEnglish
Pages (from-to)4435-4436
Number of pages2
JournalReview of Scientific Instruments
Volume70
Issue number11
DOIs
Publication statusPublished - 1999 Nov

ASJC Scopus subject areas

  • Instrumentation

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