Opt Lett. 2023 May 1;48(9):2397-2400. doi: 10.1364/OL.487607.
Few-cycle, long-wavelength sources for generating isolated attosecond soft x ray pulses typically rely upon complex laser architectures. Here, we demonstrate a comparatively simple setup for generating sub-two-cycle pulses in the short-wave infrared based on multidimensional solitary states in an NO-filled hollow-core fiber and a two-channel light-field synthesizer. Due to the temporal phase imprinted by the rotational nonlinearity of the molecular gas, the redshifted (from 1.03 to 1.36 µm central wavelength) supercontinuum pulses generated from a Yb-doped laser amplifier are compressed from 280 to 7 fs using only bulk materials for dispersion compensation.
用于产生孤立的阿秒软 X 射线脉冲的少周期、长波长源通常依赖于复杂的激光架构。在这里，我们展示了一种基于填充有 NO 的空心光纤和双通道光场合成器中的多维孤立态，在近红外短波范围内产生亚两周期脉冲的相对简单的设置。由于分子气体的旋转非线性所产生的时间相位印记，从掺镱激光放大器产生的红移（从 1.03 µm 到 1.36 µm 的中心波长）超连续脉冲仅使用体材料进行色散补偿，就从 280 fs 压缩到 7 fs。
