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Interferometric detection of ultrasound at rough surfaces using optical phase conjugation

: Betz, B.; Arnold, W.; Paul, M.

Hess, P.; Pelzl, J.:
Photoacoustic and Photothermal Phenomena 1987
Berlin/West: Springer, 1988
International Topical Meeting on Photoacoustic and Photothermal Phenomena <5, 1987, Heidelberg>
Conference Paper
Fraunhofer IZFP ()
Interferometrie; nichtlineare Optik; optische Phasenkonjugation; rauhe Oberfläche; Ultraschall

Optical detection of ultrasonic signals of 7.5 MHz center frequency has been carried out by heterodyne-interferometry at the rough surface of an aluminum sample. The distorted wave-front was reconstructed by optical phase-conjugation leading to an increase of the light-gathering power of the interferometer.