Chinese Optics Letters, 2013, 11 (1): 013201, Published Online: Jan. 15, 2013
Natural population inversion in a gaseous molecular filament Download: 843次
320.0320 Ultrafast optics 190.0190 Nonlinear optics 140.0140 Lasers and laser optics 300.0300 Spectroscopy
Abstract
We propose a new mechanism/scheme to explain the ultrafast population inversion of molecular ions which takes place in a time scale comparable to the femtosecond laser pulse. The nonlinear pumping process including the pump photons and the self-generated harmonic photons of the pump laser would be responsible for building up population inversion to realize remote molecule lasers in femtosecond laser filaments in gases. It is shown that the remote laser emissions in molecular ions of gases may be a universal process in the femtosecond laser filament.
See Leang, Huailiang Xu, Ya Cheng, Zhizhan Xu, Kaoru Yamanouchi. Natural population inversion in a gaseous molecular filament[J]. Chinese Optics Letters, 2013, 11(1): 013201.