Zinchenko Kristina S, Ardana-Lamas Fernando, Utrio Lanfaloni Valentina, Pertot Yoann, Luu Tran Trung, Wörner Hans Jakob
Opt Express. 2022 Jun 20;30(13):22376-22387. doi: 10.1364/OE.457477.
We present the energy scaling of a sub-two-cycle (10.4 fs) carrier-envelope-phase-stable light source centered at 1.76 µm to 1.9 mJ pulse energy. The light source is based on an optimized spectral-broadening scheme in a hollow-core fiber and a consecutive pulse compression with bulk material. This is, to our knowledge, the highest pulse energy reported to date from this type of sources. We demonstrate the application of this improved source to the generation of bright water-window soft-X-ray high harmonics. Combined with the short pulse duration, this source paves the way to the attosecond time-resolved water-window spectroscopy of complex molecules in aqueous solutions.
我们展示了一个中心波长为1.76 µm、脉宽低于两个周期（10.4 fs）且载波包络相位稳定的光源的能量扩展，其脉冲能量可达1.9 mJ。该光源基于空心光纤中优化的光谱展宽方案以及使用块状材料进行的连续脉冲压缩。据我们所知，这是迄今为止此类光源所报道的最高脉冲能量。我们展示了这种改进光源在产生明亮的水窗软X射线高次谐波方面的应用。结合短脉冲持续时间，该光源为水溶液中复杂分子的阿秒时间分辨水窗光谱学铺平了道路。
