Towards Generation of Sub-fs Pulses Using Lasing to Ground States of H-Like LiIII at 13.5 nm and He-Like CV at 4 nm
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2018, Springer International Publishing AG. An efficient method to transform a radiation of X-ray plasma lasers into a train of sub-fs pulses, as well as to form sub-fs pulses directly in an active medium of plasma lasers is suggested. This method is based on temporal and spatial modulation of the parameters of a resonant transition in absorbing or amplifying medium by a moderately strong IR field propagating in the same direction as an X-ray radiation.