High Harmonic Generation
High Harmonic Generation (HHG) represents a unique new technique for producing coherent (laser-like) ultrafast beams from the EUV to keV regions of the spectrum. Instead of boiling electrons off a hot filament, in HHG a femtosecond laser plucks an electron from an atom, coherently accelerates it away from, and then back to, its parent ion. When the electron recombines with the ion, its kinetic energy is coherently converted into a high harmonic photon. To generate bright beams of high harmonic light, the laser and harmonic waves must propagate in phase throughout a medium to ensure that the signal from many atoms adds coherently. KMLabs’ XUUS product accomplishes this careful propagation using a patented hollow waveguide technique.