Abstract

A novel mid-infrared laser material Cr²⁺:Cd_1−xZn_xTe, x=0.04 has been developed. Absorption of this material is centered at 1.89 μm making it suitable for Tm- based laser pumping. Spectroscopic investigation has shown broad luminescence extending from 1.9 μm to beyond 3 qm. Lifetime measurements of Cr²⁺ ion in CZT host were performed for temperatures ranging from 77 K up to room temperature. The room temperature lifetime of 2.1 μs was measured and the emission quantum efficiency of 55% was estimated. Continuous-wave laser action was achieved with the threshold of 55 mW of absorbed power. Up to 3 mW output centered at 2.65 μm was obtained.

© 2005 Optical Society of America