抄録
A tunable VUV (vacuum ultraviolet) light source by two-photon-resonant four wave sum-mixing in a Mg vapour was developed for detection of carbon atoms in plasma devices. In order to optimize VUV generation, parametric dependences of the operational characteristics on buffer gases and fundamental laser intensities were experimentally investigated, and the effect of the spatial matching between two fundamental beams on the phase matching condition was theoretically studied. An output power of 7 W (1010photons/pulse) was obtained at a resonance line of a carbon atom (156.1nm).
