Intense femtosecond laser-induced second-harmonic generation in atmospheric-pressure air

被引：0
|
作者：
Y.-D. Qin
H. Yang
C.-J. Zhu
Q. Gong
机构：
[1] Department of Physics,
[2] National Laboratory for Mesoscopic Physics,undefined
[3] Peking University,undefined
[4] Beijing 100871,undefined
[5] P.R. China,undefined
[6] Institute of Physics,undefined
[7] Chineses Academy of Sciences,undefined
[8] Beijing 100080,undefined
[9] P.R. China,undefined
来源：
Applied Physics B | 2000年 / 71卷
关键词：
PACS: 33.80.Rv; 42.65.Ky; 52.40.Nk;
D O I：
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学科分类号：
摘要：
Second-harmonic generation (SHG) in atmospheric-pressure air is experimentally studied using single focused linear-polarized Ti:sapphire intense femtosecond laser pulses at 810 nm. The efficiency of SHG is found to reach a maximum at the optical breakdown threshold of ≈2.9×1014 W/cm2. The spectral distribution and polarization property of the second harmonic are investigated. The contribution to SHG from electric-field-induced third-order mixing plays the main role even after the optical breakdown had occurred.
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页码：581 / 584
页数：3
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