Method to generate directly a broadband isolated attosecond pulse with stable pulse duration and high signal-to-noise ratio

被引：22

作者：

Hong, Weiyi ^{[1
]}

Lu, Peixiang ^{[1
]}

Lan, Pengfei ^{[1
]}

Li, Qianguang ^{[1
]}

Zhang, Qingbin ^{[1
]}

Yang, Zhenyu ^{[1
]}

Wang, Xinbing ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

来源：

PHYSICAL REVIEW A | 2008年 / 78卷 / 06期

基金：

中国国家自然科学基金;

关键词：

optical harmonic generation; optical pulse generation;

D O I：

10.1103/PhysRevA.78.063407

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A method to generate a broadband isolated attosecond pulse with stable pulse duration and high signal-to-noise ratio is proposed. By adopting a few-cycle driving pulse combined with its second-harmonic field of which the polarization angle is pi/3 with respect to the driving pulse, the short path is well selected and a smooth supercontinuum with the bandwidth of about 50 eV is observed, which leads to 100-as single attosecond pulse generation with high signal-to-noise ratio. More surprisingly, the intensity variation of the second-harmonic field can hardly affect the location and the bandwidth of the generated supercontinuum but only slightly reduce its phase-locking degree. For the intensity of the second-harmonic field higher than 10(14) W/cm(2), a pure isolated attosecond pulse with duration of about 100 as can be generated by directly filtering out a supercontinuum from 85-125 eV, which facilitates the experimental implement of the isolated attosecond pulse generation.

引用

页数：6

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