Gao Zichen, Guo Jie, Huang Yuguang, Li Jinfeng, Guo Luqi, Tu Zhihua, Xu Jingyu, Liang Xiaoyan
Opt Express. 2025 Mar 24;33(6):13613-13623. doi: 10.1364/OE.549177.
We demonstrate a high energy nonlinear pulse compression scheme based on a hybrid bulk-air multi-pass cell (MPC), achieving a high-power ultrafast source with 45 fs pulse duration, 130 W average power at 200 kHz repetition rate, and near-diffraction-limited beam quality. The impact of air nonlinearity accumulation in the MPC on beam quality is investigated to maintain good beam quality at high pulse energy, which suggests the adoption of pre-chirped and circularly-polarized pulses can effectively improve the input pulse energy and suppress the spatial quality degradation. The nonlinear mode-matching is also adopted to minimize the impact of the self-focusing effect of solid-thin-plates on q-preserving propagation. Although both solid plates and air contribute to the spectral broadening, the hybrid MPC is still an all-solid-state configuration without a pressure-controlled cell, providing a compact and economical approach for the nonlinear pulse compression at several hundred microjoules (µJ) energy levels. To the best of our knowledge, this is the highest pulse energy from the solid-state MPC configuration.
我们展示了一种基于混合块状-空气多程池（MPC）的高能非线性脉冲压缩方案，实现了一种高功率超快光源，其脉冲持续时间为45飞秒，重复频率为200千赫兹时平均功率为130瓦，且光束质量接近衍射极限。研究了多程池中空气非线性累积对光束质量的影响，以在高脉冲能量下保持良好的光束质量，这表明采用预啁啾和圆偏振脉冲可有效提高输入脉冲能量并抑制空间质量退化。还采用了非线性模式匹配来最小化固体薄板自聚焦效应对保q传播的影响。尽管固体板和空气都对光谱展宽有贡献，但混合多程池仍然是一种无压力控制池的全固态配置，为几百微焦耳（µJ）能量水平的非线性脉冲压缩提供了一种紧凑且经济的方法。据我们所知，这是固态多程池配置所能达到的最高脉冲能量。
