We present and describe different techniques based on the photorefractive effect that are
used for the optical detection of ultrasonic signals. These techniques use the wavefront …

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 (from typically 1 KHz) optical detection of ultrasound with
large light gathering from a scattering surface is presented. The wave scattered by the …

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

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

New interferometric technique for the linear detection of small out-of-plane vibrations of a
rough surface caused by ultrasound is described. The technique is based on the …

We describe the use of photorefractive material in adaptive interferometers for the detection
of small surface displacements generated by ultrasonic waves. Recent results on devices …

A novel optical sensor for the detection of ultrasonic motion has been recently developed. It
allows reaching 25 pm displacement sensitivity with a large frequency range bandwidth of …

We describe both theoretically and experimentally a polarization independent
interferometric adaptive photodetector based on photorefractive two-wave mixing. The …

We here expose theoretical and experimental results on homodyne detection using near-
infrared laser sources, at 1.06, 1.32, and 1.55 μm wavelengths. The used photorefractive …