Collinear Setup for Two-Color High Harmonic Generation
High harmonic generation (HHG) is a process in which extremely short bursts of coherent ultraviolet/soft x-ray radiation are generated by firing intense laser pulses into a dilute gas. During the long history of high harmonic generation research, several improvement schemes have been proposed. One of them was to use the driving laser pulse along with its second harmonic, which was found to raise g