Optical waveform synthesizer and its application to high-harmonic generation
Optical waveform synthesizer and its application to high-harmonic generation
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光波形合成器及其在高次谐波产生中的应用
DOI：
10.1088/0953-4075/45/7/074009
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
F. Kärtner
中科院分区：
文献类型：
--
作者：
Shu;G. Cirmi;J. Moses;K. Hong;S. Bhardwaj;J. Birge;Li;I. Kabakova;E. Li;B. Eggleton;G. Cerullo;F. Kärtner
在过去的十年中，通过强到足以减轻原子库仑势的光场来控制原子尺度的电子运动，随着相控高能少周期脉冲源的出现，已经开辟了巨大的新天地。这些物理过程的进一步研究和控制，包括高次谐波的产生，要求在子周期时间尺度上的波形整形能力，这需要一个完全相位控制的多倍频程跨越频谱。在本文中，我们提出了一种光源，该光源能够基于具有不同光谱的脉冲的相干合成或波长复用来实现具有两个倍频程跨越光谱和15 μJ脉冲能量的子周期波形整形。合成脉冲具有最短的高场瞬态，仅持续质心频率的0.8个周期（幅度FWHM）。该方法的优点在于其模块化设计以及带宽和脉冲能量的可扩展性。全相位控制允许合成由放大的光谱支持的任何光学波形。数值研究显示了基于高次谐波产生的直接隔离软X射线脉冲产生光源的独特性，大大减少甚至最终消除了对选通技术或光谱滤波的需求。该演示系统是一类用于强场物理实验阿秒控制的新型光学工具的原型。
Over the last decade, the control of atomic-scale electronic motion by optical fields strong enough to mitigate the atomic Coulomb potential has broken tremendous new ground with the advent of phase-controlled high-energy few-cycle pulse sources. Further investigation and control of these physical processes, including high-harmonic generation, ask for the capability of waveform shaping on sub-cycle time scales, which requires a fully phase-controlled multiple-octave-spanning spectrum. In this paper, we present a light source that enables sub-cycle waveform shaping with a two-octave-spanning spectrum and 15 µJ pulse energy based on coherent synthesis of pulses with different spectra, or wavelength multiplexing. The synthesized pulse has its shortest high-field transient lasting only 0.8 cycles (amplitude FWHM) of the centroid frequency. The benefit of the approach lies in its modular design and scalability in both bandwidth and pulse energy. Full phase control allows for the synthesis of any optical waveform supported by the amplified spectrum. A numerical study shows the uniqueness of the light source for direct isolated soft-x-ray pulse generation based on high-harmonic generation, greatly reducing and eventually even eliminating the need for gating techniques or spectral filtering. The demonstrated system is the prototype of a class of novel optical tools for attosecond control of strong-field physics experiments.
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影响因子：
8.6
作者：
Chipperfield, L. E.;Robinson, J. S.;Marangos, J. P.
通讯作者：
Marangos, J. P.
影响因子：
1.7
作者：
Ripandelli, G;Coppe, A M;Stirpe, M
通讯作者：
Stirpe, M
影响因子：
56.9
作者：
Wirth, A.;Hassan, M. Th.;Goulielmakis, E.
通讯作者：
Goulielmakis, E.
影响因子：
35
作者：
Krauss, Guenther;Lohss, Sebastian;Leitenstorfer, Alfred
通讯作者：
Leitenstorfer, Alfred
影响因子：
56.9
作者：
Schultze, M.;Fiess, M.;Yakovlev, V. S.
通讯作者：
Yakovlev, V. S.