Population Inversion Of ARII Laser Levels In The Hollow Cathode He-Ar Discharge

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Abstract
The population of the upper laser level 4p2P3/2 of Ar11476A laser line and the triplet metastable helium atoms density are measured in a pulsed hollow cathode He-Ar discharge. The discharge tube is a "transverse" segmented type with a 6 mm inner cathode diameter. Helium pressure varies from 8 to 20 Torr while the Argon pressure - from 0,5 to 1,5 Torr. The discharge current density varies from 50 to 250 mA/cm2. The balance equation of the upper and lower laser levels and the ground state of Ar ion are qorked out for the pulse and the afterglow. Cross section value for the excitation transfer process from a helium triplet metastable atom He(23S1) to a ground state argon ion Arll is estimated. The processes leading to inversion population between the upper and lower laser levels are investigated.© (1985) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

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