Abstract

Tunable, coherent vacuum-ultraviolet (VUV) radiation has been produced in the 1210–1290-Å region by four-wave sum mixing in magnesium vapor. This important extension of the wavelength range of tunable radiation was achieved using KrF-laser-pumped uv dye lasers, whose sum frequency then directly overlapped the first odd-parity autoionizing state in magnesium. With powers of 10 kW in the fundamental dye-laser beams, a flux ≥108 photons per pulse was produced at Lyman-α, with higher intensities at the longer wavelengths.

© 1978 Optical Society of America

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