Frequency response of fiber optic ultrasound sensors

John Dorighi*, Sridhar Krishnaswamy, Jan Drewes Achenbach

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this work the response of an embedded fiber optic ultrasound sensor has been investigated. Calculations were performed which model the fiber as a cylindrical elastic inclusion subjected to obliquely incident harmonic plane waves. The phase shift of the light traveling in the fiber was calculated along the principal strain axes as a function of frequency and incident angle. Experiments were performed to validate the calculations. Induced phase shifts were measured for the case of normally incident ultrasound impinging upon a submerged and an embedded fiber sensor. The case of obliquely incident ultrasound was also investigated for an embedded fiber at angles up to 4 degrees. The experimental measurements were performed over a bandwidth from 2 MHz to 8 MHz.

Original languageEnglish (US)
Pages (from-to)961-964
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Volume2
StatePublished - Dec 1 1995

ASJC Scopus subject areas

  • Engineering(all)

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