Few-cycle mid-infrared pulse full characterization in single shot  

作　　者：许灿华 李闯 宋立伟 王丁 冷雨欣 

机构地区：[1]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2012年第12期84-86,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 10734080, 60921004,60908008, and 61078037);the National Basic Research Program of China (No. 2011CB808101)

摘　　要：We build a frequency resolved optical gating （FROG） setup based on the second harmonic generation （SHG） FROG to characterize the mid-infrared （MIR） few-cycle laser pulse in single shot basis. Considering the extremely wide bandwidth, we use 20-μm-thick BBO crystal as the nonlinear medium, and correct the spectral response with the frequency summing efficiency. Spatial splitting is adopted to avoid additional material dispersion. In combination with a 4f imaging, this configuration enables the setup to run in single shot. With the central wavelength of 1.8 μm, the measured pulse has a duration of 9.3 fs, which corresponds to about 1.5 cycles.We build a frequency resolved optical gating （FROG） setup based on the second harmonic generation （SHG） FROG to characterize the mid-infrared （MIR） few-cycle laser pulse in single shot basis. Considering the extremely wide bandwidth, we use 20-μm-thick BBO crystal as the nonlinear medium, and correct the spectral response with the frequency summing efficiency. Spatial splitting is adopted to avoid additional material dispersion. In combination with a 4f imaging, this configuration enables the setup to run in single shot. With the central wavelength of 1.8 μm, the measured pulse has a duration of 9.3 fs, which corresponds to about 1.5 cycles.

关 键 词：Harmonic generation Nonlinear optics 

分 类 号：TN24[电子电信—物理电子学]