Cr2+:ZnSe具有很宽的吸收带和发射带,是中红外波段优秀的可调谐激光材料。从吸收光谱、发射光谱以及角度调谐输出对Cr2+:ZnSe晶体的激光输出性能进行了研究。采用真空高温扩散法制备Cr2+:ZnSe晶体,获得了高浓度的Cr2+离子掺杂的厚1.7 mm,直径10 mm的薄片ZnSe晶体。使用中心波长2.05 μm,最大输出功率8 W的Tm离子掺杂的光纤激光器抽运,使用平凹腔结构搭建谐振腔,获得了最大平均功率1.034 W,中心波长2.367 μm,线宽10 nm的连续激光输出。利用角度调谐的方法,对Cr:ZnSe晶体的调谐性能进行了研究,在100 nm范围内获得了调谐输出。

Cr2+:ZnSe having a wide range of absorption and emission spectra, is an excellent tuning laser material in mid-IR wavelength range. In this paper, lasing abilities of Cr2+:ZnSe had been studied by analyzing the absorption spectrum, emission spectrum and tuning ability. The Cr2+:ZnSe poly-crystal laser material is prepared by physical vapour transport (PVT) technique. The sample is cut and polished in thickness of 1.7 mm and with diameter of 10 mm. Pumped by a 2.05 μm Tm-ion doped silica fiber laser, delivering maximum output power of 8 W, maximum average output power of 1.034 W around 2.367 μm was demonstrated in a plate-concave resonate. The laser bandwidth was measured as 10 nm. At the same time, the laser can be tuned in 100 nm range by angle-tuning method in research of tuning ability of the laser material.