猝灭(荧光)
分析化学(期刊)
吸收截面
辐射传输
发射光谱
兴奋剂
材料科学
受激发射
激光器
大气温度范围
横截面(物理)
吸收(声学)
原子物理学
谱线
化学
光学
荧光
光电子学
热力学
物理
色谱法
量子力学
天文
复合材料
作者
Jun Dong,Alexandra Rapaport,Michael Bass,F. Szipőcs,Ken–ichi Ueda
标识
DOI:10.1002/pssa.200421122
摘要
Abstract Measurements are reported of the spectroscopic properties (absorption and emission spectra, stimulated emission cross section, and radiative lifetime) of Nd:YAG crystals doped with 1, 2 and 3 at% Nd 3+ in the temperature range between 70 and 300 K. The stimulated emission cross sections for these crystals were determined using the Füchtbauer–Ladenburg (F–L) formula at each different temperature. The absorption spectra at room temperature were used to calculate the 4 F 3/2 → 4 I 11/2 stimulated‐emission cross section and the 4 F 3/2 radiative lifetime according to Judd–Ofelt theory. As the temperature decreases the emission cross section increases, while the emission lifetime remains constant for all the samples. The temperature dependences of the stimulated emission cross sections for the differently doped crystals are in good agreement with earlier predictions. The concentration quenching effect in highly doped Nd:YAG was also addressed. Although there is concentration quenching in the highly doped Nd:YAG crystals, they are still promising efficient laser materials for high‐power microchip solid‐state lasers. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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