Abstract
Hexagonal single crystals of the solid solution are grown by the Bridgman – Stockbarger technique. We study their optical and photoluminescent characteristics and determine the temperature dependences of the photoluminescence kinetics within the range . The crystals possess a broad gain band in the range from 2 to and exhibit a weak quenching of luminescence with a quantum yield exceeding 80 % at room temperature. Tunable continuous-wave oscillation is demonstrated in the region of .
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