飞秒激光脉冲宽度和脉冲波形测试技术  

Research on femto-second laser pulse width and pulse waveform measurement technology

作　　者：吴磊[1] 阴万宏[1] 俞兵[1] 董再天 薛媛元[1] 陈娟[1] 于东钰[1] 吴沛[1] WU Lei;YIN Wanhong;YU Bin;DONG Zaitian;XUE Yuanyuan;CHEN Juan;YU Dongyu;WU Pei(Xi'an Institute of Applied Optics,Xi'an 710065,China)

机构地区：[1]西安应用光学研究所,陕西西安710065

出　　处：《应用光学》2019年第2期291-299,共9页Journal of Applied Optics

基　　金：国防预研项目

摘　　要：飞秒激光在激光核聚变、卫星精密测距、激光微加工等领域具有重要的应用前景,同时也是产生太赫兹波的主要泵浦源。介绍了国内外飞秒激光脉冲宽度和脉冲波形的测试方法,比较了自相关法、频率分辨光学快门法、光谱相位相干直接电场重构法的优缺点。自相关法具有脉宽测量范围广、结构简单等特点,但不具备脉冲波形测试能力。光谱相位相干直接电场重构法对待测激光光束质量要求较高,不适合大量程范围激光脉宽快速测量。为满足10fs～5ps大量程范围超短激光脉冲宽度和脉冲波形的测试需求,采用自相关法及二次谐波频率分辨光学开关法研制飞秒激光脉冲宽度和脉冲波形测试仪,时间分辨率优于2fs。Femto-second laser has an important application prospect in the fields of laser fusion,satellite precision ranging,laser micromachining,etc.And it is the main pump source of terahertz(THz)wave.The principles of the measurement methods of femto-second laser pulse width and pulse waveform are introduced.The advantages and disadvantages of the measurement methods of autocorrrelation(AC),frequency-resolved optical gating(FROG),and spectral phase interferometry for direct electric-field reconstruction(SPIDER)are presented.The AC is characterized by wide range of pulse width measurement and compact structure,however it does not have the ability of pulse waveform measurement.The SPIDER requires high quality of input laser beam and it is not suitable for fast measurement of laser pulse width in a large range.In order to meet the test requirements of ultra-short laser pulse width and pulse waveform in the range of 10 fs to 5 ps,a femto-second laser pulse width and pulse waveform measurement device was developed by using AC and FROG methods,and the time resolution is better than 2 fs.

关 键 词：飞秒激光 脉冲宽度 脉冲波形 测试 

分 类 号：TN24[电子电信—物理电子学]