Quimby R S, Saad M
Opt Lett. 2017 Jan 1;42(1):117-120. doi: 10.1364/OL.42.000117.
Nonradiative relaxation in Dy-doped fluoroindate glass is measured and characterized in terms of the well-known exponential energy gap law. It is found that although three low-lying Dy transitions fit well with an exponential dependence on an energy gap, the overall magnitude of the Dy decay rate is an order of magnitude higher than that of other rare earth ions. It is also found that the nonradiative decay rates in InF glass are comparable to those in ZrF glass, contrary to expectations based on maximum phonon energy. These unexpected results have important implications for a potential 4 μm Dy:InF fiber laser.
对掺镝氟铟酸盐玻璃中的非辐射弛豫进行了测量，并根据著名的指数能量间隙定律进行了表征。结果发现，尽管镝的三个低能跃迁与能量间隙的指数依赖关系拟合得很好，但镝衰减率的总体幅度比其他稀土离子高一个数量级。还发现，InF玻璃中的非辐射衰减率与ZrF玻璃中的相当，这与基于最大声子能量的预期相反。这些意外结果对潜在的4μm掺镝InF光纤激光器具有重要意义。
