大调制度中间段两波耦合强度特性的理论分析

提出了大调制度双光束耦合的中间段理论.在这种条件下,耦合波方程只能数值求解.将该理论与其它几种条件下双光束耦合理论进行比较,得出了十分有意义的理论结果.     

Effects of temperature on the dynamic evolution of two-photon photorefractive screening spatial solitons

We investigate theoretically the temperature effects on the evolutions of both bright and dark screening spatial solitons in biased two-photon photorefractive crystals.For a stable bright or dark two-photon screening spatial soliton originally formed in a crystal at a given temperature,when the crystal temperature changes,it will evolve into another stable screening soliton if the temperature change is quite small,while it will become unstable or break down if the temperature change is large enough.The spatial shape of a stable two-photon screening spatial soliton can be changed by appropriately adjusting the crystal temperature.     

双光子光折变晶体中屏蔽光伏空间灰孤子

为了证明在有外加电场的双光子光伏光折变介质中存在着稳态屏蔽光伏空间灰孤子,采用理论分析的方法导出了双光子屏蔽光伏空间灰孤子空间包络的积分表达式.数值分析了孤子灰度取不同数值的时孤子归一化包络的变化行为.结果表明:屏蔽光伏灰孤子的最小光强和半峰全宽随孤子灰度数值的增加而增加,随其减小而减小.双光子光折变屏蔽光伏灰孤子可以...     

非相干光对Ce∶KNSBN晶体两波耦合的影响研究

理论分析和实验研究了非相干光照射下Ce∶KNSBN晶体中的两波耦合,发现非相干光在很大范围内可有效地控制晶体中的两波耦合效应.实验结果和理论分析趋势相一致.     

Ce：KNSBN晶体红光两波耦合特性研究

用红光对掺铈的铌酸钾钠锶钡(KNSBN)单晶样品进行了两波耦合的测量,研究了两波耦合中样品的增益系数Γ与两束入射光夹角2θ的关系.用光折变理论拟合了Γ-2θ关系的实验结果,求出了该样品的有效光折变电荷密度,有效电光系数和电子-空穴对抗率的数值.