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基于迈克耳孙干涉仪的共线自相关超短光脉冲测量

Collinear Autocorrelation Measurement of Ultrashort Laser Pulse Based on Michelson Interferometer

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摘要

基于迈克耳孙干涉仪的原理,采用共线自相关的测量方法,同时对强度自相关和二维电场自相关进行测量。对强度自相关的测量数据进行高斯拟合,得到所测脉冲时域内光强的半峰全宽约为96.2 fs;由CMOS图像传感芯片所测得的二维电场自相关中干涉条纹的分布情况,可以得到脉冲光斑波前相位的倾斜信息;通过对干涉条纹随时间延迟变化的漂移以及持续时间,采用傅里叶级数拟合分析手段,在延迟位移平台精度限制内,得到脉冲光功率谱存在微弱的1090 nm成分。

Abstract

The collinear autocorrelation measurement method is adopted based on the principle of Michelson interferometer, in which the intensity autocorrelation and the two-dimensional electric field autocorrelation are simultaneously measured. A Gaussian function is used to fit the intensity autocorrelation data and the full width at half maximum of the measured laser pulse in time domain is about 96.2 fs. From the interference fringe distribution of two-dimensional electric field autocorrelation obtained by the CMOS imaging sensor, the tilt information of pulsed light spot wavefront phase can be obtained. Moreover, the Fourier series analysis tool is adopted to fit the interference fringes shifting with time delay. Within the restriction of delay stage accuracy, a weak component at 1090 nm is disclosed in the pulsed laser power spectrum.

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中图分类号:O436.1

DOI:10.3788/cjl201845.1204001

所属栏目:测量与计量

基金项目:国家自然科学基金(11420101003,91636105)、国家自然科学基金理论物理专项(11747058)、河南省重点研发与推广专项(182102210371)

收稿日期:2018-06-08

修改稿日期:2018-07-11

网络出版日期:2018-07-30

作者单位    点击查看

何伟:河南师范大学物理与材料科学学院, 河南 新乡 453000
崔明焕:河南师范大学物理与材料科学学院, 河南 新乡 453000
宋迪迪:河南师范大学物理与材料科学学院, 河南 新乡 453000
秦朝朝:河南师范大学物理与材料科学学院, 河南 新乡 453000
江玉海:中国科学院上海高等研究院, 上海 201210

联系人作者:何伟(wxh173@foxmail.com)

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引用该论文

He Wei,Cui Minghuan,Song Didi,Qin Chaochao,Jiang Yuhai. Collinear Autocorrelation Measurement of Ultrashort Laser Pulse Based on Michelson Interferometer[J]. Chinese Journal of Lasers, 2018, 45(12): 1204001

何伟,崔明焕,宋迪迪,秦朝朝,江玉海. 基于迈克耳孙干涉仪的共线自相关超短光脉冲测量[J]. 中国激光, 2018, 45(12): 1204001

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