Evolution and propagation of grating envelopes during erasure in bulk photorefractive media

M Jeganathan, MC Bashaw, L Hesselink - JOSA B, 1995 - opg.optica.org
We present a comprehensive analysis of the evolution of a grating envelope, in both
transmission and reflection geometry, during the erasure process in various readout …

Trapping the grating envelope in bulk photorefractive media

M Jeganathan, MC Bashaw, L Hesselink - Optics letters, 1994 - opg.optica.org
We introduce the concept of traveling grating envelopes to study the erasure dynamics in
bulk photorefractive media. This new technique provides considerable physical insight into …

Recording and erasure kinetics in photorefractive materials at large modulation depths

E Serrano, V López, M Carrascosa, F Agulló-López - JOSA B, 1994 - opg.optica.org
A numerical approach has been developed for simulating the recording and erasure kinetics
in photorefractive materials for high modulation of the light-intensity pattern. The recording …

Dynamics of a composite grating in photorefractive crystals for memory application

H Sasaki, J Ma, Y Fainman, SH Lee, Y Taketomi - JOSA A, 1994 - opg.optica.org
The dynamics of a composite grating that consists of an original grating and a newly
superimposed grating are investigated for memory applications by solution of coupled-wave …

Optical restoration of photorefractive holograms through self-enhanced diffraction

S Campbell, P Yeh, C Gu, SH Lin, CJ Cheng, KY Hsu - Optics letters, 1995 - opg.optica.org
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 …

Diffraction from thermally fixed gratings in a photorefractive medium: steady-state and transient analysis

M Jeganathan, L Hesselink - JOSA B, 1994 - opg.optica.org
We investigate diffraction from a thermally fixed grating in a photorefractive medium with an
ion concentration that is large compared with the acceptor density. A numerical solution to …

Model of amplified scattering in photorefractive media: comparison of numerical results and experiment

E Parshall, M Cronin-Golomb, R Barakatf - Optics letters, 1995 - opg.optica.org
We implement a random-walk scattering model in a nonlinear beam-propagation code to
simulate fanning in photorefractive crystals. The characteristics of the scatterers were …

Alleviation of image distortion due to striations in a photorefractive medium by using a phase-conjugated reference wave

MC Bashaw, A Aharoni, L Hesselink - Optics letters, 1992 - opg.optica.org
Growth-induced striations in photorefractive media scatter transmitted light, degrading their
performance in holographic applications. We model this phenomenon by considering the …

Distortion-free multiplexed holography in striated photorefractive media

A Aharoni, MC Bashaw, L Hesselink - Applied optics, 1993 - opg.optica.org
Growth-induced striations in photorefractive media constitute phase gratings that scatter
transmitted light and therefore degrade the quality of reconstructed images in holographic …

Temporal evolution of fanning in photorefractive materials

M Segev, D Engin, A Yariv, GC Valley - Optics letters, 1993 - opg.optica.org
We present detailed calculations of the temporal and spatial evolution of beam fanning in
photorefractive crystals that is initiated by scattering from noise. We show that fanning starts …