FIG. 2. Thermal time constants for erasure of fixed holograms and ionic relaxation. The
grating spacing depends on the wavelength and the angle between the beams; for 71 …

We report on the recording of stabilized running holograms in photorefractive materials with
arbitrarily selected phase shift φ between the transmitted and difracted beams propagating …

In this paper, we report the analysis of the recording (at room temperature), the fixing (at high
temperature) and the developing (at room temperature) procedures of high frequency …

Angular-multiplexed hologram recording in iron-doped lithium niobate crystals was carried
out with near-infrared light. An incremental recording schedule with active phase locking of …

We explore theoretically and experimentally how application of an electric field to a
photorefractive crystal affects the recording and the readout of holograms. We consider, for …

We investigate an incremental recording technique for multiplexed hologram storage in
photorefractive crystals, in which each hologram is recorded with multiple short exposures …

A Q-switched frequency-doubled Nd-YAG laser was used in recording holograms in LiNbO
3: Fe. The ensuing photorefractive sensitivity is approximately ten times higher than the …

We demonstrate holographic fixing by means of a thermal cycling procedure in pure and
doped photorefractive KNbO_3 crystals. At elevated temperatures (70–100° C) the …

A phase grating is produced in an iron-doped lithium niobate photorefractive crystal by two-
beam holographic configuration. Digital holography is used to investigate the two …

With emphasis on LiNbO 3 the basic principles, the developments over four decades, and
recent applications of the thermal fixation of photorefractive holograms are reviewed …