Holograms recorded in materials such as photorefractive crystals exhibit exponential decay
upon subsequent exposure to light. To ensure uniform diffraction efficiencies of multiple …

This thesis is devoted to the investigation and the application of holographic gratings
induced by ultraviolet light in ferroelectric materials The gratings are recorded by exploiting …

We show, theoretically and experimentally, that the buildup of the space-charge field in
photorefractive crystals is far from monoexponential for circular light beams. This is a …

We report the use of active stabilization techniques for the recording of deeply modulated
holograms in LiNbO3: Fe, far exceeding the value required for 100% diffraction efficiency …

For the first time to our knowledge, we demonstrate the use of self-enhanced diffraction to
optically restore weak dynamic volume holograms. This restoration process is achieved …

It is shown that the two-wave amplification in an alternating field in photorefractive crystals of
the sillenite family is strongly affected by the drift length of photoinduced charge carriers …

Experimental data on some basic characteristics of holograms recorded in doped and
undoped BTO crystals and fixed at room temperature such as diffraction efficiency and …

The band transport model describes charge statics and dynamics within photorefractive
materials. Here a steady-state solution is found for the setting in which an arbitrary optical …

We report the observation of photorefractive index gratings written and read out in BaTiO_3
using single pulses of 30-psec duration and fluences of 1 to 15 mJ/cm^ 2 at a wavelength of …

Photorefractive materials offer important advantages in many optical holography
applications, but the recorded images typically remain sensitive to light and therefore erase …