摘要
制备了不同Al(PO3)3含量的掺铥系列氟磷酸盐玻璃,研究了其结构、热稳定性和光谱性质.研究了不同摩尔百分数Al(PO3)3掺杂下Cr3+/Tm3+/Ho3+共掺氟磷酸盐玻璃在2.0μm处的发光特性.并且用Judd-Ofelt理论计算了强度参量,并由此计算了激发能级的自发辐射跃迁速率、辐射寿命、荧光分支比等光谱参量.结果表明,随着Tm3+浓度增加,2.0μm处发光的强度逐渐增强.证明了Tm3+(3F4)→Ho3+(5I7)能量转移是非常有效的,并与掺杂浓度有关.
Fluorophosphate glasses with various Al（PO3 ）3 contents were prepared, and their structure, thermal properties and spectral properties were studied. The emission properties at around 2.0μm of Cr^3＋/Tm^3＋/Ho^3＋ co-doped fluorophosphate glasses with different mole fractions of Tm^3＋ and Ho^3＋ were studied. The spectral strength parameters Ωt （t = 2,4,6） of those glasses have been calculated. Meanwhile, the spectral parameters, including the oscillator strength, spontaneous emission probability and branching ratios of Ho^3＋ , have been calculated. The results show that the 2.0μm emission intensity gradually grows higher with the increase of the mole fraction of Tm^3＋ . The Tm^3＋ → （^3F4 ） → Ho^3＋ （^5I7 ） energy transfer in （Tm^3＋/Ho^3＋ ） co-doped fluorophosphate glasses is very efficient, and it is dependent on the doping concentration.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第10期6373-6380,共8页
Acta Physica Sinica
关键词
氟磷酸盐玻璃
能量传递
荧光光谱
吸收光谱
fluorophosphate glasses, energy transfer, fluorescence spectra, absorption spectra
