Abstract

The demonstration of a 69.8nm laser on 3p P233s P11 (J=21) transition of Ne-like Ar pumped by capillary discharge is reported in this Letter. A main current of 12kA with rise time of 43ns was chosen to generate the plasma in a 35cm long capillary filling with pressure of Ar as low as 11Pa, resulting in a gain coefficient of 0.34cm1 and gain–length product of 11 at 69.8nm. Also observed is a weak laser on 3p D233s P13 (J=21) transition of Ne-like Ar at 72.6nm in the same condition. In addition, multiwavelength lasing at 46.9, 69.8, and 72.6nm was simultaneously realized in a capillary discharge plasma column, conditioning the pressure of Ar to 13Pa.

© 2011 Optical Society of America

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