Abstract

Tunable single-frequency continuous-wave coherent VUV radiation is generated at λVUV = 143.6 nm by resonant frequency tripling in Mg. The frequency of the output of a frequency-stabilized dye ring laser (spectral width Δν < 1 MHz) is tuned to the two-photon transition 3s2 1S0–3s3d 1D2 (λ = 430.9 nm) of Mg. A laser power of 0.2 W produces at the third harmonic more than 1.2 × 105 photons/sec (1.8 × 10−13 W). Radiation generated by this method will provide laser VUV spectroscopy of highest spectral resolution.

© 1983 Optical Society of America

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