Coupling modulation in photorefractive materials by applying ac electric fields

C Stace, AK Powell, K Walsh, TJ Hall - Optics communications, 1989 - Elsevier
In general, the application of an electric field to a photorefractive material with optical activity
results in a change in the effective electro-optic coefficient, r eff, which, in turn, alters the …

Frequency-dependent photorefractive response in the presence of applied ac electric fields

F Vachss - JOSA B, 1994 - opg.optica.org
We consider the process of nonstationary enhancement of the photorefractive effect through
the application of time-varying (square-wave) electric fields. By examining the full second …

Resonant two-wave mixing in photorefractive materials with the aid of dc and ac fields

VA Kalinin, K Shcherbin, L Solymar, J Takacs… - Optics letters, 1997 - opg.optica.org
A recently predicted resonant effect for the enhancement of two-wave mixing in
photorefractive materials is investigated. The resonance occurs when the frequency of the …

Overcoming the trap density limitation in photorefractive two-beam coupling by applying pulsed electric fields

P Mathey, G Pauliat, JC Launay, G Roosen - Optics communications, 1991 - Elsevier
By applying pulsed electric fields to photorefractive crystals, the two-wave mixing gain is
considerably increased. Unlike other enhancement techniques, the maximum gain is not …

High-frequency resonances in photorefractive crystals

A Grunnet-Jepsen, I Aubrecht, L Solymar - Optics letters, 1995 - opg.optica.org
High-frequency resonances in photorefractive crystals clickable element to expand a topic
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Fast switching of photorefractive output by applied electric field

IA Taj, P Xie, T Mishima - Optics communications, 2001 - Elsevier
We show that photorefractive materials having large electro-optic coefficients such as
BaTiO3 require relatively small electric field to induce sufficient phase mismatch for the …

Enhanced four-wave mixing in photorefractive BSO produced by temporal phase shifts

PM Johansen - Journal of Physics D: Applied Physics, 1989 - iopscience.iop.org
This paper dealt with the experimental observation of enhanced four-wave mixing in BSO.
The method used involves sinusoidal phase shift in one of the pump beams. Due to this …

Two-wave mixing in photorefractive crystals at asymmetric ac field

AV Dooghin, BY Zel'dovich - Optics communications, 1993 - Elsevier
Two-wave mixing in photorefractive crystals at asymmetric ac field Page 1 Optics
Communications 99 ( 1993 ) 221-224 North-Holland OPTICS COMMUNICATIONS Two-wave …

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 …

Two-wave mixing of time-varying non-plane-wave optical fields in photorefractive materials

L Boutsikaris, F Davidson - Applied optics, 1993 - opg.optica.org
A theoretical analysis is presented of two-wave mixing in photorefractive materials in which
the complex amplitude of a weak signal beam has slowly varying but otherwise arbitrary …