紫色半导体发光二极管激发下Sm^(3+)掺杂的铋碲酸盐玻璃的光谱能量分布与量子产率计算

Spectral Power Distribution and Quantum Yield of Sm^(3+)-Doped Bismuth Tellurite Glass under the Excitation of Violet LED

采用积分球光谱测试系统,在紫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。荧光测试系统由直径为25.4 cm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能量分布,并进一步计算出光通量分布、光量子数分布,求得辐射通量、光通量、荧光量子产率等荧光特征参数。测试与计算结果表明,对应可见区Sm3+四个特征发射峰,总辐射通量为55μW,总荧光量子产率为4.07%;可见区内,样品受激后光通量为0.02 lm。文章首次将积分球法应用于多通道跃迁稀土离子荧光性能的测试,实现了荧光特性准确评价为目的的绝对光谱能量分布测试,为发光与激光材料光学性能的精确测量与表征提供了一种新方法。

A new method for measuring the spectral power distribution in Sm^3＋-doped bismuth tellurite glass with higher refractive index and lower phonon energy by using integrating sphere was introduced and designed for the first time. Fluorescence measurement system was constituted by integrating sphere of lO-inch diameter, which was connected to a DDC detector. A standard halogen lamp was used to calibrate the t system and the auxiliary standard halogen lamp was employed for collating inner change in integrating sphere. The total radiant flux, total luminous flux and total quantum yield were calculated by luminous flux distribution and photon distribution, which were derived from spectral power distribution, and the values were 55 μW, 0. 02 lm and 4. 07%, respectively. In the present paper, the integrating sphere-method was applied to measure the luminescence parameters of the multichannel transition emissions in Sm^3＋ , and it was considered as an accurate way to characterize luminescence parameters for luminescence and laser material.