We investigate (1 + 1D) spatial optical solitons embedded in a fixed-volume grating in centrosymmetric photorefractive crystals. We numerically identify a two-parameter soliton family and deduce both its existence surface and soliton profiles. For shallow gratings, the soliton Fourier spectrum exhibits three lobes located at the reciprocal lattice points -K, 0, and K. Soliton trapping is a consequence of both the self-induced nonlinear waveguide and the grating reflectivity, which prevents the breakaway of the lateral components. To provide a preliminary evaluation of soliton stability, we also investigate the propagation of slightly perturbed soliton profiles. (c) 2006 Optical Society of America
Photorefractive solitons embedded in gratings in centrosymmetric crystals / Alessandro, Ciattoni; Carlo, Rizza; DEL RE, Eugenio; Elia, Palange. - In: OPTICS LETTERS. - ISSN 0146-9592. - STAMPA. - 31:11(2006), pp. 1690-1692. [10.1364/ol.31.001690]
Photorefractive solitons embedded in gratings in centrosymmetric crystals
DEL RE, EUGENIO;
2006
Abstract
We investigate (1 + 1D) spatial optical solitons embedded in a fixed-volume grating in centrosymmetric photorefractive crystals. We numerically identify a two-parameter soliton family and deduce both its existence surface and soliton profiles. For shallow gratings, the soliton Fourier spectrum exhibits three lobes located at the reciprocal lattice points -K, 0, and K. Soliton trapping is a consequence of both the self-induced nonlinear waveguide and the grating reflectivity, which prevents the breakaway of the lateral components. To provide a preliminary evaluation of soliton stability, we also investigate the propagation of slightly perturbed soliton profiles. (c) 2006 Optical Society of AmericaI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
