Directionally sensitive photorefractive interferometric line receiver for ultrasound detection on rough surfaces

Hemmo Tuovinen*, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

An adaptive heterodyne interferometer is configured as a line receiver using wave mixing in photorefractive bismuth silicate crystal. The line receiver is directionally most sensitive to ultrasound impinging normal to the line, and is significantly less sensitive to ultrasound impinging in other directions. Such a system is attractive in situations where the ultrasonic scatter from a specific direction is to be selectively pulled out in the presence of scatter from other "noise" sources. It is also demonstrated that the line probe system can be used to bridge the sensitivity gap that optical detection thus far has suffered vis-à-vis piezoelectric detection.

Original languageEnglish (US)
Pages (from-to)2236-2238
Number of pages3
JournalApplied Physics Letters
Volume73
Issue number16
DOIs
StatePublished - Dec 1 1998

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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