Ciattoni Alessandro, Rizza Carlo, DelRe Eugenio, Palange Elia
Consiglio Nazionale delle Richerche, CASTI Regional Laboratory, Dipartimento di Fisica, Italy.
Opt Lett. 2006 Jun 1;31(11):1690-2. doi: 10.1364/ol.31.001690.
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.
我们研究了中心对称光折变晶体中嵌入固定体积光栅的（1 + 1D）空间光学孤子。我们通过数值方法确定了一个双参数孤子族，并推导了其存在曲面和孤子轮廓。对于浅光栅，孤子傅里叶频谱呈现出位于倒易格点 -K、0 和 K 处的三个波瓣。孤子俘获是自诱导非线性波导和光栅反射率共同作用的结果，这阻止了横向分量的脱离。为了对孤子稳定性进行初步评估，我们还研究了轻微扰动的孤子轮廓的传播。
