Alphonse Marra Z, Wu Yi, Belden Nicholas, Chang Zenghu
Opt Lett. 2024 Jun 1;49(11):3170-3173. doi: 10.1364/OL.524212.
Few-cycle pulses were generated by passing a beam from a cryogenically cooled Fe:ZnSe chirped-pulse amplifier (CPA) at a repetition rate of 400 Hz through a gas-filled hollow core fiber (HCF) followed by dispersion-compensating bulk CaF. The krypton-filled fiber at 370 kPa yielded 1.14-mJ, 42-fs pulses centered at 4.07 µm, while the oxygen-filled fiber at 310 kPa delivered 0.78-mJ, 39-fs pulses spanning from 3 to 5.5 µm. This work is a step toward a high repetition rate mid-wave infrared driver of isolated attosecond keV x-ray pulses.
通过将来自低温冷却的铁掺杂硒化锌啁啾脉冲放大器（CPA）、重复频率为400Hz的光束，穿过充气空心光纤（HCF），然后经过色散补偿块状氟化钙，产生了少周期脉冲。填充氪气、压力为370kPa的光纤产生了能量为1.14mJ、脉宽为42fs、中心波长为4.07µm的脉冲，而填充氧气、压力为310kPa的光纤产生了能量为0.78mJ、脉宽为39fs、波长范围为3至5.5µm的脉冲。这项工作朝着孤立阿秒keV X射线脉冲的高重复率中波红外驱动源迈出了一步。
