Abstract
An investigation was made of the optical stability of the active medium in the form of Al2O3 containing colour centres and subjected to two-channel laser pumping. This laser medium retained its high stability under the action of pumping in the 305 and 460 nm bands because of a dynamic balance between forward and reverse charge-transfer processes in the colour centres under two-stage ionisation conditions. An optical system was proposed and a stable tunable (in the green—orange range at 520–630 nm) laser was demonstrated.
Published Version
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