Simple and efficient high-energy few-cycle pulse generation through hybrid MPC and filamentation.

The rapid advancement of ultrafast science necessitates reliable and efficient generation of few-cycle pulse sources. However, achieving this presents several challenges, including maintaining high transmission efficiency, managing nonlinear effects, and ensuring spectral coherence. In this work, we demonstrate a compact approach to generate 0.74-mJ, 8-fs pulses using a two-stage hybrid MPC and filamentation system with a high overall transmission of 74%. This few-cycle source features uniform spatial spectral distribution and excellent long-term power stability.