Abstract

We report a comprehensive study of gamma-irradiation on optical, electrical, and laser characteristics of pure and transition-metal doped single and polycrystalline ZnS and ZnSe. Polished pure, Cr-doped, and Ag, Au, Cu, Al, In, and Mn co-doped ZnS and ZnSe crystals after absorption and electro-conductivity characterization were gamma-irradiated at doses of 1.37x10<sup>8</sup>, and 1.28x10<sup>8</sup> rad at +10 and -3&deg;C, respectively. Dynamic RT absorption studies, electro-conductivity measurements and mid-IR lasing were performed for different exposition times of crystals at RT. Cr:ZnSe and Cr:ZnS lasers based on identical gamma-irradiated and non-irradiated crystals featured a very similar pump thresholds, slope efficiencies, and output powers.

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