We present an improved version of the classical heterodyne interferometer for ultrasound
detection, which includes a double phase conjugate mirror DPCM in the detection arm. The …

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 …

We present and describe two techniques used for optical detection of ultrasonic signals
based on the photorefractive effect. These techniques used the wavefront adaptation …

A method which allows broadband optical detection of ultrasound with large etendue from a
scattering surface is presented. The wave scattered by the surface interferes with a …

Heterodyne interferometers using two‐wave mixing in photorefractive cubic crystals for
ultrasound detection on rough surfaces are demonstrated. The speckled scattered beam …

Two-wave mixing based interferometry has been demonstrated to be a powerful technique
for non-contact, broadband and speckle insensitive measurements of the small surface …

An heterodyne optical probe, which permits one to measure out-of-plane and in-plane
displacements at the surface of a specimen excited by ultrasound is presented. The …

A novel scheme to detect ultrasonic motion at the surface of a solid sample is presented. The
surface ofthe sample is illuminated by a laser and the light scattered by the surface is …

To detect ultrasound remotely, an optical detection scheme is described which uses a
confocal Fabry-Perot interferometer and conjugate detection. A conjugate signal is derived …

An adaptive heterodyne interferometer is configured as a line receiver using wave mixing in
photorefractive bismuth silicate crystal. The line receiver is directionally most sensitive to …