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以 Fe:Li Nb O3晶体为例 ,考虑了电子载流子热激发 (强烈地依靠于温度 ) ,通过对以扩散和光伏特效应为主导输运机制的带输运方程和耦合波方程进行数值求解 ,分析了热固定过程初始光强入射比和固定温度对光栅空间电荷场的影响 ,指出记录固定过程中内电场极值的出现来源于质子电场对施主光栅电场的部分补偿 ,质子光栅电荷场可以导致晶体中记录光束之间能量耦合方向的变化 ,得出了理论上的加热固定时间
In the case of Fe: Li Nb O3 crystals, the thermal excitation of the electron carriers (strongly dependent on the temperature) is considered, and the values of the transport equations and the coupled wave equations dominated by the diffusion and photovoltaic effects transport mechanisms The influence of the initial light intensity and the fixed temperature on the charge field of the grating was analyzed. It was pointed out that the extrema of the internal electric field during the recording and fixing process originated from the partial compensation of the electric field of the donor grating to the electric field of the donor grating. The charge field of the proton grating Can lead to changes in the direction of energy coupling between the recording beams in the crystal, resulting in a theoretically fixed heating time