HC Pedersen, PM Johansen, DJ Webb - JOSA B, 1998 - opg.optica.org
Using the so-called ac field technique, we investigate experimentally the influence of optical beam coupling on the generation of subharmonic gratings in a photorefractive sillenite …
PM Johansen, HC Pedersen, EV Podivilov, BI Sturman - Physical Review A, 1998 - APS
The stationary solution is obtained for the photorefractive subharmonic gratings excited in crystals of the sillenite family by a standing light interference pattern and an applied ac …
T Gatlin, N Singh - Optics letters, 1999 - opg.optica.org
A fully nonlinear frequency response of a moving grating in bismuth silicon oxide, including the effects of an applied electric field, is modeled by solution of the time-dependent …
RV Litvinov, SM Shandarov, DV Yakimov… - Technical Physics, 1997 - Springer
We investigate the polarization and electrical properties of additional light beams associated with the generation of the spatial subharmonic K/2 of a fundamental photorefractive grating …
HC Pedersen, PM Johansen - JOSA B, 1995 - opg.optica.org
We present an analysis of what is called parametric oscillation in photorefractive media. It is shown theoretically that when a running grating and a constant electric field are applied to a …
A finite-difference technique was used to model photorefractive grating formations in sillenite crystals under nonstationary recording conditions of applied ac electric fields. These …
EV Podivilov, HC Pedersen, PM Johansen, BI Sturman - Physical Review E, 1998 - APS
We develop the nonlinear theory of transversal parametric oscillation in photorefractive sillenite crystals. The theory is nonlinear in the sense that the nonlinear feedback from the …
SM Shandarov, VY Krasnoperov, VA Kartashov… - Inorganic materials, 2001 - Springer
The space-charge-field harmonics in the refractive-index grating generated in a bismuth silicate crystal to which a square-wave external electric field is applied were examined …
HC Pedersen, PM Johansen, EV Podivilov… - Optics …, 1998 - Elsevier
We analyze the nonlinear excitation of holographic gratings in a photorefractive crystal being subject to an alternating electric field and a stationary light interference pattern. The …