聚对苯撑乙烯衍生物/氯仿溶液的自衍射及光限幅特性的研究  

Study on Self-diffraction and Optical Limiting Property of Poly-Phenylene Vinylene Derivative/Chloroform Solution

作　　者：李霞[1,2] 侯洵[1,2] 姚保利[3] 杨文正[3] 冯晓强[3] 贺锋涛[3] 易文辉[4] 

机构地区：[1]河南大学物理与信息光电子学院 [2]中国科学院西安光学精密机械研究所瞬态光学技术国家重点实验室,西安710068 [3]中国科学院西安光学精密机械研究所瞬态光学技术国家重点实验室 [4]西安交通大学电信学院

出　　处：《光子学报》2004年第5期549-552,共4页Acta Photonica Sinica

摘　　要：用 5 32nm基模高斯光束对 2 甲氧基 5 丁氧基取代聚对苯撑乙烯的氯仿溶液进行激光诱导衍射实验及光限幅特性的研究 实验发现 ,当高斯光束通过样品溶液时 ,在远场处出现衍射环 ;随着入射功率的增大 ,衍射图案会发生显著的变化 理论分析表明 ,该现象可以用光克尔效应、热效应作用下的附加相位孔对入射光束的衍射行为来解释 还进一步研究了 5 32nm激光作用下样品溶液的光限幅特性 ,根据实验结果分析得出By using the 532 nm TEM 00 laser beam,the laser induced diffractive and optical limiting properties of the(2 methoxy 5 butoxy)Poly phenylene vinylene derivative/chloroform Solution are studied.When the 532 nm laser beam passes through the sample solution,the patterns of diffraction rings are observed in far field.With laser′s input power being increased,the patterns have apparent changes.These phenomena can be explained by the diffraction effect of the Gaussian beam from the laser induced phase hole in the nonlinear medium caused by Kerr effect and thermo optic effect. Further, optical limiting properties of PPV derivative are discussed at 532 nm. According to experimental results, the main mechanism of optical limiting can be explained by the effect of diffraction rings caused by thermo optic action.

关 键 词：2-甲氧基5-丁氧基取代聚对苯撑乙烯 自衍射 空间自相位调制 光限幅特性 

分 类 号：O437[机械工程—光学工程]