Generation of millijoule-level sub-5 fs violet laser pulses  

作　　者：Xinhua Xie Yi Hung Yunpei Deng Adrian L.Cavalieri Andrius Baltuška Steven L.Johnson 

机构地区：[1]SwissFEL,Paul Scherrer Institute,Villigen PSI,Switzerland [2]Photonics Institute,Technische Universität Wien,Vienna,Austria [3]Institute of Applied Physics,University of Bern,Bern,Switzerland [4]Institute for Quantum Electronics,Physics Department,ETH Zurich,Zurich,Switzerland

出　　处：《High Power Laser Science and Engineering》2024年第2期33-40,共8页高功率激光科学与工程（英文版）

摘　　要：We demonstrate the generation,spectral broadening and post-compression of second harmonic pulses using a thin beta barium borate(BBO)crystal on a fused-silica substrate as the nonlinear interaction medium.By combining second harmonic generation in the BBO crystal with self-phase modulation in the fused-silica substrate,we efficiently generate millijoule-level broadband violet pulses from a single optical component.The second harmonic spectrum covers a range from long wave ultraviolet(down to 310 nm)to visible(up to 550 nm)with a bandwidth of 65 nm.Subsequently,we compress the second harmonic beam to a duration of 4.8 fs with a pulse energy of 0.64 mJ(5 fs with a pulse energy of 1.05 mJ)using chirped mirrors.The all-solid free-space apparatus is compact,robust and pulse energy scalable,making it highly advantageous for generating intense second harmonic pulses from near-infrared femtosecond lasers in the sub-5 fs regime.

关 键 词：post-compression second harmonic generation self-phase modulation supercontinuum generation 

分 类 号：TN24[电子电信—物理电子学]