Piccoli Riccardo, Rovere Andrea, Jeong Young-Gyun, Jia Yuechen, Zanotto Luca, Légaré François, Schmidt Bruno E, Morandotti Roberto, Razzari Luca
Opt Express. 2019 Oct 28;27(22):32659-32665. doi: 10.1364/OE.27.032659.
We present a system for extremely broadband terahertz (THz) generation based on an Ytterbium (Yb) amplified laser emitting 170-fs-long pulses centered at 1030 nm. The pulses are first spectrally broadened in an Ar-filled hollow-core capillary fiber (HCF) and then recompressed down to ∼18 fs with a chirped-mirror pair. Extreme broadband THz pulses of bandwidths up to 60 THz and peak electric field as high as 55 kV/cm are obtained via two-color plasma generation. The combination of high-power Yb laser systems with gas-filled HCF opens the path towards the realization of the next generation high-repetition-rate, extremely broadband, and intense-field THz time-domain spectroscopy systems.
我们展示了一种基于镱（Yb）放大激光的极宽带太赫兹（THz）产生系统，该激光发射中心波长为1030 nm、脉宽为170 fs的脉冲。这些脉冲首先在充氩的空芯毛细管光纤（HCF）中进行光谱展宽，然后用一对啁啾镜将其重新压缩至约18 fs。通过双色等离子体产生，获得了带宽高达60 THz、峰值电场高达55 kV/cm的极宽带太赫兹脉冲。高功率Yb激光系统与充气HCF的结合为实现下一代高重复率、极宽带和强场太赫兹时域光谱系统开辟了道路。
