Abstract
It has been shown that the sensitization scheme involving non-radiative energy transfer from Tb3+ to Nd3+ in selenide glass is suitable for pumping a mid-infrared Nd3+ ion laser. Stimulated emission corresponding to a novel laser transition 4I11/2–4I9/2 of Nd3+ ions was demonstrated at liquid nitrogen temperature. Using an intracavity CaF2 prism, the laser was tunable from 5.56 to 6.01 μm. Output energy up to 16 mJ has been obtained.
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