Increasing the radiation energy of ZnSe : Fe2+ laser at room temperature

• Published in: Laser physics letters 2014-08, Vol.11 (8)
• Main Authors: Firsov, K N, Gavrishchuk, E M, Kazantsev, S Yu, Kononov, I G, Rodin, S A
• Format: Article
• Language: English
• Subjects: laser; non-chain HF laser; optical pumping; ZnSe:Fe
• ISSN: 1612-2011; 1612-202X
• DOI: 10.1088/1612-2011/11/8/085001

Characteristics of the laser on a polycrystalline ZnSe : Fe2+ sample pumped by the radiation of a non-chain electro-discharge HF laser at room temperature are investigated. The radiation spot of the HF laser on a surface of an active element had an elliptical shape with the axes a × b = 2.8 × 3.2 ÷ 8.25 × 9.5 mm. A maximal generation energy E = 192 mJ was obtained at the efficiency with respect to the energy absorbed in the sample ηabs = 23% at the dimensions of the pumping spot a × b = 6.8 × 7.5 mm. In this case, a maximal slope efficiency with respect to the absorbed energy was ηsl = 29%. At the spot dimensions a × b = 2.8 × 3.2 mm the slope efficiency was ηsl = 34%. Possibilities of a further increase of the generation energy of a ZnSe : Fe2+ laser pumped by radiation of the HF laser at room temperature are discussed.