Infrared Two-Color Multicycle Laser Field Synthesis for Generating an Intense Attosecond Pulse

被引：223

作者：

Takahashi, Eiji J. ^{[1
]}

Lan, Pengfei ^{[1
]}

Muecke, Oliver D. ^{[2
]}

Nabekawa, Yasuo ^{[1
]}

Midorikawa, Katsumi ^{[1
]}

机构：

[1] RIKEN Adv Sci Inst, Extreme Photon Res Grp, Wako, Saitama 3510198, Japan

[2] Vienna Univ Technol, Photon Inst, A-1040 Vienna, Austria

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 23期

基金：

奥地利科学基金会;

关键词：

EXTREME-ULTRAVIOLET; NONLINEAR OPTICS; SUPERCONTINUUM;

D O I：

10.1103/PhysRevLett.104.233901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose and demonstrate the generation of a continuum high-order harmonic spectrum by mixing multicycle two-color (TC) laser fields with the aim of obtaining an intense isolated attosecond pulse. By optimizing the wavelength of a supplementary infrared pulse in a TC field, a continuum harmonic spectrum was created around the cutoff region without carrier-envelope phase stabilization. The obtained harmonic spectra clearly show the possibility of generating isolated attosecond pulses from a multicycle TC laser field, which is generated by an 800 nm, 30 fs pulse mixed with a 1300 nm, 40 fs pulse. Our proposed method enables us not only to relax the requirements for the pump pulse duration but also to reduce ionization of the harmonic medium. This concept opens the door to create an intense isolated attosecond pulse using a conventional femtosecond laser system.

引用

页数：4

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