光学学报, 2006, 26 (9): 1439, 网络出版: 2006-09-14
7 fs超快强激光驱动Ar原子产生支持单个阿秒脉冲的高次谐波连续谱
Generation of High-Order Harmonic Continuum Supporting Single Attosecond Pulse in Argon Driven by Intense 7 fs Laser Pulse
摘要
采用脉冲宽度为7 fs,脉冲能量为 0.4 mJ的超快强激光脉冲与气体盒子中Ar原子作用获得了高次谐波截止区连续谱,并发现当驱动激光稳定在不同的载波包络相位时,高次谐波的谱结构、谱调制深度和连续谱的带宽都有很大区别。在某些载波包络相位时获得了平滑的连续谱,调制深度小于17%,连续带宽达10 eV,从而支持时域上获得变换极限500 as的单个阿秒脉冲。
Abstract
Highorder harmonic continuum in the cutoff region is demonstrated with an argon gas cell driven by 7 fs/0.4 mJ ultrashort intense laser pulses. It is found that the spectral structure, modulation depth and continuum bandwidth vary greatly when the carrier envelope phase (CEP) of driving laser pulse is stabilized at different value. At some CEP value, a smooth continuous spectrum with modulation depth less than 17% and 10 eV continuum bandwidth is achieved, supporting a transformlimited single 500 as pulse in time domain.
郑颖辉, 熊辉, 彭滟, 徐晗, 曾志男, 杨旋, 陈晓伟, 李儒新, 曾和平, 徐至展. 7 fs超快强激光驱动Ar原子产生支持单个阿秒脉冲的高次谐波连续谱[J]. 光学学报, 2006, 26(9): 1439. 郑颖辉, 熊辉, 彭滟, 徐晗, 曾志男, 杨旋, 陈晓伟, 李儒新, 曾和平, 徐至展. Generation of High-Order Harmonic Continuum Supporting Single Attosecond Pulse in Argon Driven by Intense 7 fs Laser Pulse[J]. Acta Optica Sinica, 2006, 26(9): 1439.
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