We describe a new method for photorefractive response time measurement in fast
photorefractive crystals based on continuous phase modulation in two-wave mixing. We …

The photorefractive effect is of considerable interest for parallel optical processing
operations. Semiconductor materials have received attention because of their potentially fast …

We demonstrate a novel way to analyse carrier recombination and transport processes in
photorefractive semiconductors via the exposure characteristics of light induced diffraction …

Three image processing experiments were performed by degenerate four‐wave mixing in
photorefractive GaAs. The experiments were imaging by phase conjugation, edge …

Two-wave mixing gain in photorefractive GaAs: Cr using the moving grating technique has
been measured. The results compare well to theory when a value of τ di/τ 2 measured by …

We consider phase conjugation via degenerate four-wave mixing in photorefractive crystals
when more than one grating mechanism is operative. A method for exact solution of the …

We have used a 20-kHz ac square-wave electric field to enhance the beam-coupling gain
and the degenerate four-wave mixing reflectivity of photorefractive GaAs at 1.06 μm. The …

The polarization dependence of two-wave mixing for two common crystal orientations is
described and theoretical and experimental results given. The direction of energy exchange …

Slowdown of Gaussian “dark pulses” in photorefractive crystal using a two-wave mixing
method is shown at room temperature. In agreement with our theoretical model, the …

We measure the absorption coefficient and refractive index changes produced in
photorefractive quantum wells of GaAs by using a high-sensitivity periodically phase …