Chinese Optics Letters, 2014, 12 (3): 030201, Published Online: Mar. 17, 2014
Generation of high-order harmonic continuum with two-hump-structure infrared laser pulse Download: 554次
020.2649 Strong field laser physics 190.2620 Harmonic generation and mixing 190.4410 Nonlinear optics, parametric processes
Abstract
We experimentally investigate the high-order harmonic generation in argon gas cell driven by a multi-cycle broadband infrared laser pulse from a tunable optical-parametric-amplifier (OPA) source. The generation of high-order harmonic continuum with the cut-off photon energy up to 110 eV is observed by tuning the chirp of the 800-nm laser pulse which pumps OPA source. The generation of harmonic continuum is understood in terms of the two-hump structure of the OPA output spectrum and the optimal relative phase of the two humps. The demonstrated scheme is of importance for the generation of extreme ultraviolet (XUV) continuum at higher photon energy region.
Candong Liu, Pengfei Wei, Jing Miao, Chunmei Zhang, Yansui Huang, Yinghui Zheng, Yuxin Leng, Zhinan Zeng. Generation of high-order harmonic continuum with two-hump-structure infrared laser pulse[J]. Chinese Optics Letters, 2014, 12(3): 030201.