影响光折变晶体双光束耦合温度效应的参数理论分析  

THE EFFECT OF PHYSICAL PARAMETERS ON THE TEMPERATURE CHARACTERISTICS OF TWO-BEAM COUPLING IN PHOTOREFRACTIVE CRYSTAL

作　　者：刘劲松[1] 

机构地区：[1]西安电子科技大学技术物理系,西安710071

出　　处：《物理学报》1993年第7期1086-1091,共6页Acta Physica Sinica

摘　　要：用单载流子一能级带导模型讨论了光折变晶体双光束耦合的温度特性。全面分析了物理参数对温度特性的影响。提出了热不敏感区的概念。若能使晶体在此区域内工作,则可获得效率高,热噪声小,工作点的温度漂移量小的最佳效果。给出了物理参数同热不敏感区的位置与范围的关系,提出了改进实验效果的具体方法。The temperature characteristics of two-beam coupling in photorefractive crystal was discussed by using the one-carrier and one-level band-conduction model. The effect of physical parameters on the temperature characteristics was analyzed generally. In this paper, the concept of thermosenseless range has been put forward. If a crystal operates in this range, the optimum results of high efficiency, small thermonoise and small thermodrift of operation point can be obtained. The relationship between physical parameter and the location and extent of the range has been given, the method to amend experiment has been suggested.

关 键 词：光折变晶体 双光束耦合 温度相关 

分 类 号：O734.1[理学—晶体学]