Four Wave Difference Frequency Generation at 124nm for High Resolution Photoabsorption Studies of O2

Abstract

Previous VUV generation techniques used to carry out high resolution absorption and photodissociation spectroscopy of molecular oxygen have relied on stimulated anti-Stokes Raman scattering to produce tunable VUV radiation(1,2). However, such studies are limited in practice by low conversion efficiencies to wavelengths >1500A in the Schumann-Runge band and continuum region.