4,4’-二甲氨基二苯乙烯分子光限幅特性  

Optical Power Limiting of 4,4'-bis(dimethylamino) Stilbene

作　　者：张克虎[1,2] 周勇[1] 王传奎[1] 

机构地区：[1]山东师范大学物理与电子科学学院,山东济南250014 [2]山东水利职业学院,山东日照276826

出　　处：《济南大学学报（自然科学版）》2011年第2期206-208,共3页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金(10974121)

摘　　要：通过求解速率方程和傍轴波动方程,研究纳秒激光脉冲在4,4’-二甲氨基二苯乙烯分子介质中的传播过程。分析脉冲传播距离和脉冲宽度对分子材料光限幅特性的影响,并对不同脉宽下的双光子吸收截面进行了拟合。结果显示,4,4’-二甲氨基二苯乙烯分子具有较大的双光子吸收截面,且其双光子吸收截面随脉冲脉宽的增大而增大,表明4,4’-二甲氨基二苯乙烯分子是一种较好的光限幅材料。The propagation of nanosecond laser pulse in 4,4＇-bis（dimethylamino） stilbene medium is studied by numerically solving the coupled rate equations and paraxial wave equation.The influence of pulse propagating distance and pulse width on the optical power limiting properties is specially analyzed,and the two-photon absorption cross section is numerically fitted.The results show that the molecule has a strong two-photon absorption cross section,and the two-photon absorption cross section is enhanced as the pulse width is increased,which indicates that this molecule is a good candidate for optical power limiting material.

关 键 词：双光子吸收 光限幅 速率方程 

分 类 号：O494[理学—物理]