Alismail Ayman, Wang Haochuan, Barbiero Gaia, Altwaijry Najd, Hussain Syed Ali, Pervak Volodymyr, Schweinberger Wolfgang, Azzeer Abdallah M, Krausz Ferenc, Fattahi Hanieh
Ludwig-Maximilians-University of Munich, Faculty of Physics, Am Coulombwall 1, 85748 Garching, Germany.
Physics and Astronomy Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
Sci Adv. 2020 Feb 14;6(7):eaax3408. doi: 10.1126/sciadv.aax3408. eCollection 2020 Feb.
The development of high-energy, high-power, multi-octave light transients is currently the subject of intense research driven by emerging applications in attosecond spectroscopy and coherent control. We report on a phase-stable, multi-octave source based on a Yb:YAG amplifier for light transient generation. We demonstrate the amplification of a two-octave spectrum to 25 μJ of energy in two broadband amplification channels and their temporal compression to 6 and 18 fs at 1 and 2 μm, respectively. In this scheme, due to the intrinsic temporal synchronization between the pump and seed pulses, the temporal jitter is restricted to long-term drift. We show that the intrinsic stability of the synthesizer allows subcycle detection of an electric field at 0.15 PHz. The complex electric field of the 0.15-PHz pulses and their free induction decay after interaction with water molecules are resolved by electro-optic sampling over 2 ps. The scheme is scalable in peak and average power.
高能量、高功率、多倍频程光脉冲的产生目前是阿秒光谱学和相干控制等新兴应用推动下的研究热点。我们报道了一种基于掺镱钇铝石榴石（Yb:YAG）放大器的相位稳定、多倍频程光源，用于产生光脉冲。我们展示了在两个宽带放大通道中将两倍频程光谱放大至25 μJ的能量，并分别在1 μm和2 μm波长处将其时间压缩至6 fs和18 fs。在该方案中，由于泵浦脉冲和种子脉冲之间固有的时间同步性，时间抖动被限制为长期漂移。我们表明，合成器的固有稳定性允许在0.15 PHz频率下对电场进行亚周期检测。通过电光采样在2 ps时间内解析了0.15-PHz脉冲的复电场及其与水分子相互作用后的自由感应衰减。该方案在峰值功率和平均功率方面具有可扩展性。
