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Data Fit and Analysis for Pump-probe Experiment with Femtosecond Pulses Based on LabVIEW
Li-wei Yuan,Li Wang,Ji-ling Bai
Author NameAffiliationE-mail
Li-wei Yuan State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023  
Li Wang State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023 Liwangye@dicp.ac.cn 
Ji-ling Bai State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023  
Abstract:
The pump-probe experiments for 1,3-dichlorobenzene in gas phase have been performed by femtosecond multiphoton ionization mass spectra at a pump pulse of 270 nm and a probe pulse of 810 nm by using our homebuilt femtosecond laser system. The models for the exponential process and quantum beat are presented to extract the photodissociation dynamics information from the data. A fitting and analyzing software which is programmed by graphical language LabVIEW has been developed for the experimental data. The Convolution, Levenberg Marquardt,and Deconvolution mathematics VIs of LabVIEW are used in this program to make the program much simpler than using other programming languages. The experimental data have been well fitted with this program. The results provide the lifetime of excited-state S1 and the frequency of quantum beat.
Key words:  Femtosecond,Pump-probe,Quantum,Data fit,LabVIEW
FundProject:
飞秒泵浦-探测实验中量子拍频现象的数据处理
袁丽威,王利*,白吉玲
摘要:
应用飞秒时间分辨的泵浦-探测技术结合飞行时间质谱的方法研究1,3-二氯苯分子光解离动力学过程.对于泵浦-探测数据中的指数衰减过程及量子拍频现象选择合适的模型进行拟合,得到正确的光解动力学信息.采用图形化编程语言LabVIEW编写程序,其中调用了LabVIEW数学分析程序包中的卷积、去卷积及Levenberg Marquardt最小二乘法拟合子程序等模块,对实验数据进行了处理,得到1,3-二氯苯的第一激发态S1 的寿命.同时也对反映量子相干现象的数据进行拟合,得到量子拍频的频率.
关键词:  飞秒  泵浦-探测  量子拍频  数据拟合  LabVIEW
DOI:10.1088/1674-0068/18/1/4-8
分类号: