摘要
实验发现在 Ce:(K0 .5Na0 .5) 0 .2 (Sr0 .6 1Ba0 .39) 0 .9Nb2 O6 (Ce:KNSBN)光折变晶体的同一点记录两幅光栅时 ,其中一幅光栅的衍射效率 (η)相对于两光束夹角 (2θ)的关系曲线峰值位置由仅存储一幅光栅时的 3 6°变为 44°.采用跳跃模型的微扰分析方法解释了这一现象 .
Two gratings are recorded in photorefractive crystal Ce:(K 0 5 Na 0 5 ) 0 2 (Sr 0 61 Ba 0 39 ) 0 9 Nb 2O 6(Ce:KNSBN) by angle multiplexing and denoted as G 1 and G 2,respectively.It is found that the peak position of the diffraction efficiency η as a function of the angle between the two incident beams 2θ of G 1 is at 44°.But if single grating in this crystal is recorded only,the peak position is at 36°.The result is theoretically explained by using a perturbative expanding method to the hopping model
出处
《光子学报》
EI
CAS
CSCD
2000年第5期466-469,共4页
Acta Photonica Sinica
基金
This research was supported by the Nature Science Foundation of Nation and Foundation of Harbin Institute of Technology
关键词
光折变
跳跃模型
多重存储
偏移
Photorefraction
Hopping model
Multiple storage
