Abstract
Laser emission at 126 nm has been obtained from excimers of Ar2 excited electrically in a nozzle discharge followed by supersonic expansion. The direct measurement of light amplification with a tunable VUV probe leads to a gain of >3 cm−1. This high gain arises from efficient population inversion of low vibrational and rotational levels of the excimer state brought about by the supersonic expansion and cooling of the discharge plasma.
© 1989 Optical Society of America
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