All-fiber heterodyne interferometer for vibration measurements in audible frequency range

Christophe Gorecki; Tijani Gharbi; Michel Spajer

doi:10.1117/12.140801

15 February 1993 All-fiber heterodyne interferometer for vibration measurements in audible frequency range

Christophe Gorecki, Tijani Gharbi, Michel Spajer

Proceedings Volume 1756, Interferometry: Applications; (1993) https://doi.org/10.1117/12.140801
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

The calibration of the novel laser heterodyne interferometry system for measurement of vibrations of small amplitude in the audible frequency range is described. A frequency-shifted reference beam is compared with an unshifted test beam that is phase modulated by a vibrating surface. Vibration displacements down 10 nm in the frequency range from 150 Hz to 10 KHz are measured. The system is ideally suited for biological movement analysis, for example, the acoustic emission evaluation from human cochlea excited by electrical stimuli.

Citation Download Citation

Christophe Gorecki, Tijani Gharbi, and Michel Spajer "All-fiber heterodyne interferometer for vibration measurements in audible frequency range", Proc. SPIE 1756, Interferometry: Applications, (15 February 1993); https://doi.org/10.1117/12.140801

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