Testing of the ultrasonic signal is an important matter in laser ultrasonic field. Because of the
weakness of the surface vibration caused by ultrasonic, common methods can hardly satisfy …

The technology of non-contact and non-destructive detection of acoustic and ultrasound
waveforms play an importance role in industrial application which make it possible to …

The advantages of ultrasonic remote detection using a heterodyne photorefractive
interferometer are demonstrated. The speckle nature of the light reflected by a rough surface …

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

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 report on a laser ultrasonic receiver based on two wave mixings in two nonlinear
Bi12SiO20 (BSO) photorefractive crystals and its application for welded joints inspection …

Green region of spectrum is one of most promising for interferometric applications since the
sensitivity grows with reduction of wavelength, and powerful CW lasers are commercially …

We present an improved detection scheme for a two-wave mixing interferometer with a
Bi12SiO20 crystal. The proposed detection scheme allows quasi-balanced detection of …

Laser ultrasonic detectors are configured as point-and line-array receivers using wave
mixing in photorefractive BSO crystals. The arrays are formed by passing a collimated laser …

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