摘要
利用快速Hankel变换的方法,对薄介质的Z扫描进行了理论分析。讨论了近top hat光束Z扫描曲线的特征,分析了闭孔近top hat光束下限制光阑半径与光束扩束半径之比(光阑束腰比)对归一化透射率的影响,通过理论分析,给出了获得最佳测量灵敏度的光阑束腰比值.在最佳灵敏度的实验配置下分析了远场光阑的大小对归一化透射率的影响.
The Z scan theory of thin optically nonlinear medium, by using the fast Hankel transform,is analyzed. The characteristics of Z scan curves under near top-hat beams are discussed. Meanwhile, the influence of the ratio (diaphragm-girdling ratio) of the limiting diaphragm radius to the radius of expanded beams on normalized transmittance using near top-hat beams under closed-aperture is analyzed. Through theoretical analysis, the ratio with the best sensitivity is given. Finally, the influence of the size of the far-field diaphragm on normalized transmittance under the experimental configuration with the best sensitivity is analyzed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第6期2735-2738,共4页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60025512)
教育部科学技术研究重点(重大)项目(批准号00026)
高等学校骨干教师资助计划项目
霍英东教育基金资助的课题(批准号:71008).~~
