稀土钐离子可见荧光量子产率的精确测试与计算

采用积分球配以CCD光谱测试系统,在蓝色半导体发光二极管激发下,对Sm3 掺杂的低声子能量、高折射率铋碲酸盐玻璃的荧光光谱进行测试。实现了荧光发射特性绝对评价为目的的绝对光谱功率分布测定,为发光与激光材料荧光发射特性的精确测量与表征提供了一种准确方法。荧光测试系统由直径为25.4cm的积分球配以CCD探测器组成,通过标准卤素灯定标,辅助卤素灯校正积分球内环境变化,解析出样品的绝对光谱功率分布,并进一步计算出光量子数分布,求得荧光量子产率等荧光特征参量。测试与计算结果表明,对应可见区Sm3 四个特征发射峰,总荧光量子产率为7.55%。

Accurate Measurement of Quantum Yields for Visible Emission Transitions of Sm3+

Quantum yields for multichannel transition emissions have been determined in Sm~(3 )-doped heavy metal tellurite glass under the pumping of blue lighting emitting diode.To achieve this intention,the necessary fluorescence spectra were measured and calibrated in an integrating sphere with 25.4 cm diameter,which was connected to a CCD detector.Standard halogen lamp was used for calibrating the measurement system and auxiliary halogen lamp was applied to determine the changes in throughput at the different steps of the measurement.The spectral power distribution of the sample under the blue light emitting diode(LED)pumping was derived from the measured spectra firstly,and then the quantum yields for the visible emissions of Sm~(3 )were calculated based on the distribution and the total quantum yields in visible region is 7.55%.