Shine a helium‐neon laser at a crystal of barium titanate, and at first the beam merely
passes through the crystal. After a few seconds, however, the incident beam begins to …

The response of photorefractive materials to sinusoidal intensity patterns of high modulation
depths is considered. It is shown that the induced refractive-index response in this regime is …

We describe a novel procedure for obtaining enhanced nondestructive holographic readout
in SBN, where the key new ingredient is utilization of degrees of freedom in polarization of …

We demonstrate a technique by which the amplitudes of the various spatial harmonics of a
holographic grating written in a photorefractive material may be increased with respect to …

The response of a photorefractive phase conjugator to time-varying signals is examined.
Maxwell's equations are coupled to the material equations followed by linearization using a …

We present real-time optical preprocessor intended to enhance small defects in a smooth
surface. The heart of the system is a photorefractive Bi_12SiO_20 phase-conjugate mirror …

Evidence is presented to support the theory that photoexcited charge carriers screen the
field due to the trapped charges that form the phase grating in photorefractive materials. The …

Photoinduced charge dynamics in photorefractive semiconductors is studied from both,
theoretical and experimental points of view in the case of an external field screening. This …

A method of enhancing the degenerate four-wave mixing (DFWM) conjugate reflectivity in
photorefractive BSO is described, which uses an auxiliary beam of different wavelength to …

Two-wave mixing has been observed in Cr-doped semi-insulating GaAs using a compact
Nd: YLF diode-pumped solid-state CW laser system at 1.31 microns. Significant …