摘要
基于光学系统对傍轴激光束的传输与变换技术—ABCD定理,以非线性相移为研究对象,采用表征高斯光束特征的q参量在光束无像散近似假设下,分析了Z-扫描测量方法的理论基础,得到了表达简单的解析理论公式.在非线性相移|ΔΦ0| <πrad时,所得模拟结果可以很好地与已知理论结果相吻合.对CS2和纳米碳管乙醇溶液的非线性测量及数据的拟合,证明了用此结论进行数据分析的简洁性和优越性.
Based on the laser transmitting and transforming technology of ABCD theory,an analysis on the theoretical foundation of Z-scan has been made by employing an aberration-free approximation of a Gaussian beam and using the investigated object of nonlinear phase shifts directly,which resulted in some simple analytical expressions for Z-scan transmittance. Under the condition that ｜△Ф0｜〈πrad,the simulated result is coincident with what has been known. Also the concision and advantage of data analysis using it can be proved by the two Z-scan experiments of CS2 and CNTs ethanol solution.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2007年第3期444-447,共4页
Acta Photonica Sinica
基金
教育部国际合作项目(教外司留[2003]317号)
陕西省国际合作项目(2005kw-22)资助
关键词
三阶非线性极化率
ABCD定理
q参量
Third-order nonlinear susceptibility
ABCD formalism
q-parameter
