Characterization of 20-fs VUV pulses by plasma-mirror frequency-resolved optical gating

被引：3
|
作者：
Itakura, Ryuji [1 ]
Akagi, Hiroshi [1 ]
Otobe, Tomohito [1 ]
机构：
[1] Natl Inst Quantum & Radiol Sci & Technol QST, Kansai Photon Sci Inst, 8-1-7 Umemidai Kizugawa, Kyoto 6190215, Japan
来源：
OPTICS LETTERS | 2019年 / 44卷 / 09期
基金：
日本学术振兴会;
关键词：
ATTOSECOND PULSES; LASER-PULSES; STREAKING; DYNAMICS;
D O I：
10.1364/OL.44.002282
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate that vacuum ultraviolet (VUV) pulses (lambda similar to 160 nm) with 20-fs duration can be fully characterized by plasma-mirror frequency-resolved optical gating. Plasma is formed as an ultrafast optical switch on a fused silica surface by irradiation of an intense near-infrared (NIR) femtosecond laser pulse. We measure the spectra of the VUV pulses reflected off plasma as a function of the delay with respect to the NIR pulse and reconstruct it to simultaneously extract a nearly Fourier-transform limited VUV pulse shape and a time-dependent reflectivity of plasma using the least-squares generalized projections algorithm. We show that there is almost no spatial dependence of the VUV pulse shape, whereas the plasma mirror reflectivity strongly depends on the spatial region. (C) 2019 Optical Society of America
引用
收藏
页码：2282 / 2285
页数：4
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