A laser-quality anisotropic ${\rm ZnS}{:}{{\rm Cr}^{2 +}}$ element was obtained using prolonged hot isostatic pressing at high temperature. Lasing centered at a wavelength of 2.45 µm was obtained with longitudinal pumping at a wavelength of 1.94 µm. The short-cavity laser slope efficiency with respect to the absorbed power was about 78%. The lasing wavelength was continuously tuned in the range of 2.35–2.52 µm by rotating the Brewster active element around the normal to its surface.

中文翻译：

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各向异性 ZnS:Cr2+ 晶体：用于紧凑高效的中红外可调谐激光器的材料

在高温下使用长时间的热等静压获得了激光质量的各向异性${\rm ZnS}{:}{{\rm Cr}^{2 +}}$元素。以 2.45 µm 波长为中心的激光是通过 1.94 µm 波长的纵向泵浦获得的。相对于吸收功率的短腔激光斜率效率约为 78%。通过围绕其表面的法线旋转布鲁斯特有源元件，激光波长在 2.35-2.52 µm 的范围内连续调谐。