Opt Lett. 2018 Jun 1;43(11):2720-2723. doi: 10.1364/OL.43.002720.
We demonstrate the generation of 21 fs (1.8 optical cycle), 45-µJ, carrier-envelope phase (CEP)-stable optical pulses with an octave-spanning spectrum from 2.2 to 4.9 µm. Multi-cycle output pulses (120 fs, 149 µJ, 3.5 µm, and 300 Hz) from a KTA-based optical parametric amplifier are compressed down to the sub-two-cycle regime using YAG and Si plates. The single-shot CEP stability of the compressed pulses is measured to be 283 mrad for 500 s. This robust and compact scheme realizes a field strength of 282 MV/cm with f/11 focusing, opening a new regime of attosecond strong-field physics in solids.
我们展示了一种从 2.2 到 4.9μm 光谱范围扩展一倍的 21fs（1.8 个光学周期）、45μJ、载波包络相位（CEP）稳定的光学脉冲的产生。基于 KTA 的光参量放大器的多周期输出脉冲（120fs、149μJ、3.5μm 和 300Hz）使用 YAG 和 Si 板压缩到亚两周期范围。压缩脉冲的单次 CEP 稳定性在 500s 内测量为 283mrad。这种稳健紧凑的方案在 f/11 聚焦下实现了 282MV/cm 的场强，开辟了固体中阿秒强场物理的新领域。
