Oxide glasses for mid-infrared lasers
Oxide glasses for mid-infrared lasers
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DOI：
10.1117/12.886722
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
B. Richards;A. Jha;G. Jose;Xin Jiang
中科院分区：
文献类型：
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作者：
B. Richards;A. Jha;G. Jose;Xin Jiang
我们概述了稀土掺杂重金属氧化物和氟氧玻璃，它们有望作为在2-5 μm光谱区域工作的激光的宿主材料，用于医疗，军事和传感应用。根据工程玻璃的成分和纯度，碲酸盐和锗酸盐玻璃可以支持高达5 μm及以上的透射，并且与氟化物玻璃相比，具有良好的热、机械和环境稳定性。我们讨论了增强红外透射的玻璃净化和水去除技术。通过比较玻璃的材料性能和所选稀土掺杂离子的光谱性能，我们可以确定在中红外光纤和体激光器中有前途的成分。碲酸盐玻璃最近已被证明是一种适用于~2 μm光谱区域的高效紧凑型激光器的主体材料，以纤维和块状形式存在，下一个挑战是将工作范围进一步扩展到硅纤维不够透明的红外区域，并提供氟化物玻璃和纤维的替代品。
We present an overview of rare-earth doped heavy metal oxide and oxy-fluoride glasses which show promise as host materials for lasers operating in the 2-5 μm spectral region for medical, military and sensing applications. By engineering glass composition and purity, tellurite and germanate glasses can support transmission up to and beyond 5 μm and can have favourable thermal, mechanical and environmental stability compared to fluoride glasses. We discuss techniques for glass purification and water removal for enhanced infrared transmission. By comparing the material properties of the glass, and spectroscopic performance of selected rare-earth dopant ions we can identify promising compositions for fibre and bulk lasers in the mid-infrared. Tellurite glass has recently been demonstrated to be a suitable host material for efficient and compact lasers in the ~2 μm spectral region in fibre and bulk form and the next challenge is to extend the operating range further into the infrared region where silica fibre is not sufficiently transparent, and provide an alternative to fluoride glass and fibre.