Theory of Incoherent Self-Focusing in Biased Photorefractive Media
- 27 January 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (4) , 646-649
- https://doi.org/10.1103/physrevlett.78.646
Abstract
A theory describing propagation and self-focusing of partially spatially incoherent light beams in nonlinear media is developed. It is shown that this process is effectively governed by an infinite set of coupled nonlinear Schrödinger-like equations, provided they are initially appropriately weighted with respect to the incoherent angular power spectrum of the source. The particular case of spatially incoherent beam propagation in biased photorefractive media is considered in detail. Numerical simulations indicate that spatial compression as well as self-trapped states are possible under appropriate conditions. Our results are in good agreement with recent experimental observations.Keywords
This publication has 20 references indexed in Scilit:
- Self-Trapping of Partially Spatially Incoherent LightPhysical Review Letters, 1996
- Observation of Two-Dimensional Spatial Solitary Waves in a Quadratic MediumPhysical Review Letters, 1995
- Observation of two-dimensional steady-statephotorefractive screening solitonsElectronics Letters, 1995
- Spatial solitons in photorefractive Bi12TiO20 with drift mechanism of nonlinearityApplied Physics Letters, 1994
- Observation of self-trapping of an optical beam due to the photorefractive effectPhysical Review Letters, 1993
- Self-focusing and self-defocusing by cascaded second-order effects in KTPOptics Letters, 1992
- Observation of spatial optical solitons in a nonlinear glass waveguideOptics Letters, 1990
- Propagation soliton et auto-confinement de faisceaux laser par non linearité optique de kerrOptics Communications, 1985
- Self-Focusing of Optical BeamsPhysical Review Letters, 1965
- Self-Trapping of Optical BeamsPhysical Review Letters, 1964