… We describe an optical method to detect u&sonic waves on materials with rough surfaces.
Scattered … A Michelson interferometer with a flat frequency response is adopted for faithful …

… carried out by heterodyne interferometry at the rough surface of an aluminum sample. …
optical phase conjugation leading to an increase of the light-gathering power of the interferometer…

… of an optical interferometer assembly enabling us to detect ultrasonic displacements at rough
surfaces. … scattered from the surface is reconstructed by using phaseconjugation leading to …

… ultrasound on samples with optically rough surfaces have … recent developments in
interferometric detection methods that … , non-linear optical techniques for phase conjugation do not …

… In this paper we demonstrate the use of low-power self-pumped phase conjugated
interferometer for laser induced ultrasound detection. The phase conjugation compensated …

… surface, optical systems, usually interferometers, must be used to convert the frequency or …
interferometer can be an advantage when making measurements on optically rough surfaces. …

… to an homodyne detection system having a large étendue. In the double phase conjugate
heterodyne detection system … Arnold, “Interferometric detection of ultrasound at rough surfaces …

… of the optical system. Finally, we built a mutually phase conjugating interferometer to detect
the ultrasound … 8 In order to detect the vibration of a rough surface, or defects inside sample …

… a detector. However, the Fabry-Perot approach requires active stabilization of the cavity
length, and systems based on a phase conjugation mirror require some expensive optical …

… transducers (EMATs), laser generation and optical holographic or interferometric detection.
… one of the most advantageous methods of phase conjugation of ultrasound beams [49, 150] …