Energetic few-cycle pulse compression in gas-filled hollow core fiber with concentric phase mask

Zhao Yu^{1, 2}, Huang Zhi-Yuan^{1, 2}, Zhao Rui-Rui^{1, 2}, Wang Ding^{1, †}, Leng Yu-Xin^{1, ‡}

Experimental setup for few-cycle pulse compression in neon-filled HCF with concentric phase mask. L1 and L2 represent convex and concave reflecting mirror, respectively. Combination of L1 and L2 is telescope.