Betz, B.B.BetzArnold, W.W.ArnoldPaul, M.M.Paul2022-03-082022-03-081988https://publica.fraunhofer.de/handle/publica/315024Optical 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.enInterferometrienichtlineare Optikoptische Phasenkonjugationrauhe OberflächeUltraschall620658670Interferometric detection of ultrasound at rough surfaces using optical phase conjugationconference paper