Engineering rare-earth-doped heavy metal oxide glasses for 2-5 µm lasers
Engineering rare-earth-doped heavy metal oxide glasses for 2-5 µm lasers
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工程用于 2-5 µm 激光器的稀土掺杂重金属氧化物玻璃
DOI：
10.1117/12.852180
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Richards B
中科院分区：
文献类型：
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作者：
Richards B
三价稀土离子中的电子态为设计用于大气遥感和激光雷达技术的高效光纤和体激光器提供了极好的机会。本文的第一部分重点介绍了2-5 μm传输的工程无源光纤。本文叙述了用高纯块状玻璃棒制作单模碲酸钨光纤的方法。用抽气法和管中棒法制备光纤预制棒，拉制出数值孔径为0.1，纤芯直径为10±2 μm的光纤。在974 nm处测得的损耗为2.3 dBm-1。这些光纤可用作无源传输光纤或有源光纤，用于在2-5 μm光谱区发射激光。在玻璃制造中使用重金属氧化物导致延长的红外透射。本文的第二部分比较了Tm 3+和Tm 3 +/Ho 3+掺杂玻璃和光纤在碲酸盐和氧化锗基质中的1950-2080 nm激光器的斜率效率。我们还解释了选择1950-2080 nm可调谐激光器作为泵浦源的重要性，在更长的波长的受激发射。
The electronic states in trivalent rare-earth ions offer an excellent opportunity for designing efficient fibre and bulk lasers for atmospheric remote sensing and LIDAR technology. The first part of this review article focuses on engineering passive fibres for 2-5 μm transmission. The fabrication of single-mode tungsten tellurite optical fibres from high purity bulk glass rods is described. Fibres with a numerical aperture of 0.1 and core diameter of 10±2 μm have been drawn using suction and rod-in-tube techniques of fibre preform fabrication. Losses of 2.3 dBm-1 at 974 nm have been measured. These fibres are of interest for use as passive transmission fibre or active fibres for lasing in the 2-5 μm spectral region. The use of heavy metal oxides in the fabrication of glass leads to extended infrared transmission. In the 2ndpart of the review we compare the slope efficiencies of Tm3+and Tm3+/Ho3+doped glasses and fibres for 1950-2080 nm lasers using a range of pumping schemes in tellurite and germanium oxide hosts. We also explain the importance of choosing 1950-2080 nm tunable lasers as a pump source for stimulated emission at longer wavelengths.