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提出了有偏压光伏光折变晶体中存在着明暗矢量孤子,它起源于对外电场的非均匀空间屏蔽和光伏效应.当光伏效应为零时,这些明暗矢量孤子就转化为明暗矢量屏蔽孤子,其物理系统就转化为明暗矢量屏蔽孤子的物理系统;当外电场为零时,这些明暗矢量孤子预言了明暗矢量光伏孤子,其物理系统预言了明暗矢量光伏孤子的物理系统.应用光束传播的方法讨论了这些明暗矢量孤子的稳定性.结果表明,当σ> 0 和(β+α-δ) > 0 时,在(β+α-δ)小于某一值的区域内,这些明暗矢量孤子是稳定的;其中σ为控制两光束强度的参数,β为与外偏压有关的参数,α和β为与晶体的光伏系数有关的参数;当σ<0和(β+α-δ) <0时,在(β+α-δ)大于某一值的区域内,这些明暗矢量孤子也是稳定的.
It is proposed that the light and dark vector solitons exist in the biased photovoltaic photorefractive crystal, which originated from the non-uniform space shielding and photovoltaic effect on the external electric field. When the photovoltaic effect is zero, these light and dark vector solitons transform into light and dark vector shielding solitons, The physical system is transformed into a physical system of light and dark vector shielding solitons. When the external electric field is zero, these light and dark vector solitons predict light and dark vector photovoltaic solitons and their physical systems predict the physical system of light and dark vector photovoltaic solitons. The stability of these light and dark vector solitons is discussed. The results show that when σ> 0 and (β + α-δ)> 0, these bright and dark vector solitons are in the region of (β + α-δ) less than a certain value Where σ is the parameter controlling the intensity of the two beams, β is the parameter related to the external bias, α and β are the parameters related to the photovoltaic coefficient of the crystal, and when σ <0 and (β + α-δ) <0 , These bright and dark vector solitons are also stable in the region where (β + α-δ) is larger than a certain value.