Gain and stability in photorefractive two-wave mixing

I de Oliveira, J Frejlich - Physical Review A, 2001 - APS
We demonstrate that the negative amplitude gain in a photorefractive two-wave-mixing
experiment under applied electric field measurably reduces the characteristic instability of …

Interference-term real-time measurement for self-stabilized two-wave mixing in photorefractive crystals

PAM Dos Santos, L Cescato, J Frejlich - Optics letters, 1988 - opg.optica.org
We report the real-time direct interference-term measurement for a two-wave-mixing
experiment in photorefractive crystals. Knowledge of the interference term may provide …

Phase modulation in two-wave mixing for dynamically recorded gratings in photorefractive materials

J Frejlich, PM Garcia, KH Ringhofer, E Shamonina - JOSA B, 1997 - opg.optica.org
We derive an analytical expression describing the effect of phase modulation in two-wave
mixing for dynamically recorded phase-shifted holograms in photorefractive materials. The …

Selective two-wave mixing in photorefractive crystals

J Frejlich, AA Kamshilin, PM Garcia - Optics letters, 1992 - opg.optica.org
A new technique that permits the selective steady-state continuous detection of phase
(photorefractive) or amplitude (photochromic) effects in two-wave mixing experiments is …

Phase-controlled photorefractive running holograms

AA Freschi, PM Garcia, J Frejlich - Optics communications, 1997 - Elsevier
We report on the use of phase modulation in two-wave mixing with negative feedback to
record stabilized photorefractive running holograms with arbitrarily fixed phase shift between …

Enhancement of the signal-to-background ratio in photorefractive two-wave mixing by mutually incoherent two-beam coupling

S Breugnot, M Defour, D Dolfi, H Rajbenbach… - Optics letters, 1994 - opg.optica.org
We present and experimentally demonstrate a new method for enhancing the signal-to-
background ratio of two-wave mixing in photorefractive crystals. The method uses a mutually …

A simple analytic solution for transient two-wave mixing in photorefractive materials

DR Erbschloe, T Wilson - Optics Communications, 1989 - Elsevier
We present a very simple solution to the coupled partial differential equations which
describe the time dependence of hologram formation in photorefractive materials. The …

Time-dependent behavior of photorefractive two-and four-wave mixing

M Horowitz, D Kligler, B Fischer - JOSA B, 1991 - opg.optica.org
A theoretical and experimental study of the temporal response of photorefractive two-and
four-wave mixing processes is given. We examine the buildup and the decay of the output …

Exact solution to photorefractive two-wave mixing with arbitrary modulation depth

MR Belić, D Timotijević, M Petrović, MV Jarić - Optics communications, 1996 - Elsevier
We obtain analytical solution to the slowly varying envelope wave equations describing two-
wave mixing in photorefractive crystals with arbitrary dependence of the gain and absorption …

Charge–carrier diffusion length in photorefractive crystals computed from the initial hologram phase shift

AA Freschi, PM Garcia, J Frejlich - Applied physics letters, 1997 - pubs.aip.org
The phase shift between the pattern of light onto a photorefractive crystal and the resulting
hologram at the very beginning of the recording process in two-wave mixing is analyzed and …