2-DIMENSIONAL 2-PHASE WATER DETECTION USING A TUNABLE EXCIMER-LASER

A method for simultaneous two-dimensional visualization of water in bo th gas and liquid phase is presented. This laser-based diagnostic tech nique uses a combination of two-photon laser-induced fluorescence (LIF ) and spontaneous Raman scattering. A tunable KrF excimer laser, opera ting near 248 nm, was used as an excitation source. The technique was demonstrated on single water droplets and their surrounding gas-phase content, Prior to the visualization experiments, spectroscopic measure ments were performed to find optimum filtering conditions.