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| Z-扫描参量对薄膜材料三阶非线性光学特性的影响 | |
| 引用本文： | 甘平,卿胜兰,鲜晓东.Z-扫描参量对薄膜材料三阶非线性光学特性的影响[J].光子学报,2014,40(9):1333-1337. |
| 作者姓名： | 甘平 卿胜兰 鲜晓东 |
| 作者单位： | （重庆大学 a.西南资源开发及环境灾害控制工程教育部重点实验室,b.通信工程学院,c.自动化学院,重庆 400044） |
| 基金项目： | 重庆市科委科技计划项目院士专项(No.2008BC4003)资助 |
| 摘 要： | 采用数值计算方法对薄膜材料的Z-扫描参量进行研究.对不同激光脉宽下Z-扫描的三阶非线性折射系数和吸收系数进行分析,结果显示不同等级的脉宽激光器对计算结果的数量级影响很大.对不同小孔光阑半径的Z-扫描闭孔曲线进行仿真,结果显示光阑小孔越小,获得特征曲线的峰谷值越明显.对不同光阑离透镜焦点的距离值进行Z-扫描闭孔曲线仿真,结果显示距离为1/2透镜焦距值时闭孔Z-扫描曲线能得到相对较大的峰谷差值.数值分析结果与相关文献报道的实验结果基本一致. |
| 关 键 词： | Z-扫描 薄膜材料 三阶光学非线性 激光脉宽 |
| 收稿时间： | 2011-03-30 |
Effects of Z-scan Parameters on the Third-order Nonlinear Optical Properties of Films Materials |
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| GAN Ping,QING Sheng-lan,XIAN Xiao-dong.Effects of Z-scan Parameters on the Third-order Nonlinear Optical Properties of Films Materials[J].Acta Photonica Sinica,2014,40(9):1333-1337. | |
| Authors: | GAN Ping QING Sheng-lan XIAN Xiao-dong |
| Institution: | （a.Key Laboratory for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering(Ministry of Education)|b.College of Communication Engineering|c.College of Automation, Chongqing University,Chongqing 400044,China) |
| Abstract: | Parameters about Z-scan measurements of thin films were investigated using numerical methods.Differences of the magnitude of Z-scan′s third-order nonlinear refractive index and absorption coefficient were observed under different laser pulse duration using numerical simulation.The more obvious peak-valley features of Z-scan′s closed-aperture curve were observed with the smaller aperture hole by simulating under aperture radius for different hole.The more obvious peak-valley features of Z-scan′s closed-aperture curve were observed by simulating under different distances of aperture lens to focus,when distance is 1/2 lens focal length.The experimental results reported in the literature related agree well with the theoretical analysis.The results have some significance to the measurement of Z-scan with films. |
| Keywords: | Z-scan Film materials Third-order optical nonlinearities Laser pulse duration |
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