修正和完善了有偏压的光伏光折变晶体中空间孤子的空间电荷场理论 .通过对有偏压的光伏光折变晶体中低振幅明孤子的自偏转进行的研究 ,得到了孤子光束中心的运动呈抛物线型 ,并且这束中心光的空间频率分量随传播距离发生线性移动 .当光伏效应可忽略时 ,低振幅明孤子的自偏转就转化为低振幅屏蔽孤子的自偏转 ,它的空间电荷场就转化为屏蔽孤子的空间电荷场 ;当外偏压为 0时 ,它的空间电荷场就转化为闭路和开路光伏孤子的空间电荷场 ,它的自偏转预言了低振幅光伏明孤子也存在着自偏转 .这类孤子的自偏转可以用于制造孤子波分复用器 The space charge field theory of space soliton in the photorefractive crystal with bias voltage is modified and perfected.By studying the self-deflection of low amplitude bright soliton in the photorefractive crystal with bias voltage, the soliton beam center , And the spatial frequency component of the central light moves linearly with the propagation distance.When the photovoltaic effect is negligible, the self-deflection of the low-amplitude bright soliton transforms into the self-deflection of the low-amplitude shielding soliton, and its space The charge field is converted into the space charge field of the soliton. When the external bias is zero, its space charge field translates into the space charge field of the closed and open photovoltaic solitons. Its self-deflection predicts that the low-amplitude photovoltaic soliton There is self-deflection. The self-deflection of such solitons can be used to create soliton wavelength division multiplexers