Intensity‐dependent upconversion efficiencies of Er3+ ions in heavy‐metal fluoride glass
Intensity‐dependent upconversion efficiencies of Er3+ ions in heavy‐metal fluoride glass
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重金属氟化物玻璃中 Er3+ 离子强度依赖性上转换效率
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
I. Aggarwal
中科院分区：
文献类型：
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作者：
D. Yeh;W. Sibley;I. Schneider;R. Afzal;I. Aggarwal
重金属氟化物玻璃中的Er 3+离子将红外辐射上转换为较短波长，其中一些掺杂有Yb 3+，已经在宽强度范围内和各种激发波长下进行了研究。在室温下测量的上转换效率随强度线性地或二次地变化，并且取决于发射波长在100 W/cm 2或更高时饱和。对于BaF 2/ThF 4中的4摩尔% ErF 3，对于400 W/cm 2的吸收1.5 μm功率，4 I11/2到4 I15/2的转变效率超过10%，即，对于4 I15/2至4 I13/2激励。速率方程模型和Judd-Ofelt对仅掺杂Er 3+的玻璃的数据分析提供了对上转换过程的理解，同时产生了Er 3+能量转移速率和激发态布居的值。这些结果可用于开发用于激光发射和红外光学探测器的玻璃。重金属氟化物玻璃中的Er 3+离子（有些掺杂了Yb 3+）对红外辐射向较短波长的上转换在宽的强度范围和各种激发波长下进行了研究。在室温下测量的上转换效率随强度线性地或二次地变化，并且取决于发射波长在100 W/cm 2或更高时饱和。对于BaF 2/ThF 4中的4摩尔% ErF 3，对于400 W/cm 2的吸收1.5 μm功率，4 I11/2到4 I15/2的转变效率超过10%，即，对于4 I15/2至4 I13/2激励。速率方程模型和Judd-Ofelt对仅掺杂Er 3+的玻璃的数据分析提供了对上转换过程的理解，同时产生了Er 3+能量转移速率和激发态布居的值。这些结果可用于开发激光玻璃和红外光学探测器。
The upconversion of infrared radiation to shorter wavelengths by Er3+ ions in heavy‐metal fluoride glasses, some doped with Yb3+, has been studied over a wide intensity range and for various excitation wavelengths. The upconversion efficiency measured at room temperature varies linearly or quadratically with intensity and saturates at 100 W/cm2 or higher, depending on emission wavelength. For 4 mol % ErF3 in BaF2/ThF4, the 4I11/2 to 4I15/2 transition is over 10% efficient for 400 W/cm2 of absorbed 1.5‐μm power, i.e., for 4I15/2 to 4I13/2 excitation. A rate equation model and Judd–Ofelt analysis of data for the glasses doped with just Er3+ provide an understanding of the upconversion process while yielding values for Er3+ energy‐transfer rates and excited‐state populations. These results could be used to develop glasses for lasing and as infrared optical detectors.The upconversion of infrared radiation to shorter wavelengths by Er3+ ions in heavy‐metal fluoride glasses, some doped with Yb3+, has been studied over a wide intensity range and for various excitation wavelengths. The upconversion efficiency measured at room temperature varies linearly or quadratically with intensity and saturates at 100 W/cm2 or higher, depending on emission wavelength. For 4 mol % ErF3 in BaF2/ThF4, the 4I11/2 to 4I15/2 transition is over 10% efficient for 400 W/cm2 of absorbed 1.5‐μm power, i.e., for 4I15/2 to 4I13/2 excitation. A rate equation model and Judd–Ofelt analysis of data for the glasses doped with just Er3+ provide an understanding of the upconversion process while yielding values for Er3+ energy‐transfer rates and excited‐state populations. These results could be used to develop glasses for lasing and as infrared optical detectors.