实验研究了(Cu,Ce):LiNbO3晶体用蓝光敏化红光全息记录的光强对记录灵敏度和饱和衍射效率的影响.敏化光增加了记录灵敏度,足够高的光强将导致灵敏度的饱和行为.记录光以亚线性的关系Ixr(x<1)增大记录曲线η12t初始记录阶段的斜率,因而降低了记录灵敏度.饱和衍射效率对记录光和敏化光光强的依赖关系表明了存在饱和衍射效率的极大值.

The effect of intensity on the recording sensitivity and saturation diffraction efficiency was studied experimentally in holographic recording of (Cu,Ce):LiNbO 3 crystal by use of a red beam for recording and a blue for sensitizing. The sensitizing light increases the recording sensitivity, and the saturation behavior will appear with enough high intensity of sensitizing light. The recording light increases the recording slope defined as the initial time derivative of the square root of the diffraction efficiency by sublinear relation I x r (x<1) and thus the recording light decreases the recording sensitivity. Dependences of the saturation diffraction efficiency on the intensities of the recording and sensitizing light show that there is the maximum saturation diffraction efficiency.