Hologram enhancement in photorefractive media

P Yeh, C Gu, CJ Cheng, KY Hsu - Optical engineering, 1995 - spiedigitallibrary.org
We consider the possibility of restoration and/or enhancement of decaying holograms in
photorefractive media by using a simple optical readout in conjunction with a phase …

Transverse instabilities in photorefractive counterpropagating two-wave mixing

O Sandfuchs, J Leonardy, F Kaiser, MR Belić - Optics letters, 1997 - opg.optica.org
Threshold analysis for transverse instabilities in photorefractive counterpropagating two-
wave mixing through reflection gratings is performed. A numerical algorithm for the treatment …

Diffraction properties of multiple-beam photorefractive gratings

R Saxena, F Vachss, I McMichael, P Yeh - JOSA B, 1990 - opg.optica.org
We have analytically solved the problem of N mutually incoherent pairs of beams in
photorefractive media, each pair of which shares a common grating. The results are applied …

Self-organization and Fourier selection of optical patterns in a nonlinear photorefractive feedback system

O Sandfuchs, F Kaiser, MR Belić - Physical Review A, 2001 - APS
The formation of patterns in two transverse dimensions in photorefractive two-wave mixing
with a single feedback mirror is investigated theoretically. We perform numerical simulations …

Optical restoration of photorefractive holograms

P Yeh, C Gu, CJ Cheng, KY Hsu - Applied Physics B, 1995 - Springer
We consider the possibility of restoration and/or enhancement of decaying holograms in
photorefractive media by using a simple optical readout in conjunction with a phase …

Pattern dynamics and competition in a photorefractive feedback system

C Denz, M Schwab, M Sedlatschek, T Tschudi… - JOSA B, 1998 - opg.optica.org
We investigate the temporal dynamics of transverse optical patterns spontaneously formed
in a photorefractive single-feedback system with a virtual feedback mirror. The linear stability …

Transmission of time modulated optical signals through an absorbing photorefractive crystal

P Delaye, LA De Montmorillon, G Roosen - Optics Communications, 1995 - Elsevier
We solve the problem of the transmission of time modulated signals in a two-beam coupling
photorefractive set-up using an absorbing material. We obtain an analytical expression that …

Steady state and dynamic gratings in photorefractive four-wave mixing

SA Bugaichuk, AI Khizhnyak - JOSA B, 1998 - opg.optica.org
The structure and dynamics of the four-wave mixing transmission grating in a photorefractive
crystal were investigated. The steady-state grating s amplitude distribution looks like a …

Strong and fast phase modulation for quantitative analysis of photorefractive gratings

AA Freschi, PV Dos Santos, J Frejlich - Applied Physics B, 2006 - Springer
A new approach for studying photorefractive gratings in two-wave mixing experiments by a
phase modulation technique is presented. The introduction of a large-amplitude, high …

Effects of strong modulation on beam-coupling gain in photorefractive materials: application to B12SiO20

JG Murillo, LF Magaña, M Carrascosa, F Agulló-López - JOSA B, 1998 - opg.optica.org
The steady-state beam-coupling gain during two-wave mixing in photorefractive materials
has been analyzed in the strong nonlinear regime (high modulation depths). Numerical …