Abstract

Coherent second-harmonic radiation has been generated in atomic zinc vapor at 1792.5 and 1601 Å from the 5¹S₀ and 4¹D₂ states, respectively, by two-photon resonance enhancement. Measurements of the ratio of second- to third-harmonic generation suggest the occurrence of static electric fields of ~5 kV/cm. These fields are caused by ionization of ~2% of the atoms in the focal volume of the incident laser beam.

© 1982 Optical Society of America

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