摘要
用熔融淬冷法制备了系列不同组分和Tm3+/Yb3+掺杂浓度的Ge-Ga-Se-CsI硫卤玻璃样品,测试了样品的拉曼光谱、折射率、吸收光谱、红外荧光光谱。研究了975nm激光泵浦下样品的1.23μm和1.8μm荧光特性。分析了Tm3+/Yb3+之间声子辅助的共振能量转移,结果表明两个离子间有效的能量转移途径为Yb3+∶2F5/2→Tm3+∶3 H5。计算得到常温下Tm3+∶3 H5→3F4和Tm3+∶3F4→3 H6跃迁的多声子弛豫速率分别为303s-1和0.30s-1。
A serial of chalcohalide glasses based on the composition Ge-Ga-Se-CsI doped with the different Tm3＋/Yb3＋ ions concentration were synthesized by melt-quenching technique.The refractive indexes,Raman spectra,absorption spectra,infrared fluorescence of the samples were measured.The 1.23 μm and 1.8 μm fluorescence properties were investigated with different Tm3＋/Yb3＋ ion concentrations under 975 nm laser excitation.The results show that the effective energy transfer between two rare-earth ions are mainly attributed to the resonance energy of phonon-assistant absorption from Yb3＋∶2F5/2 to Tm3＋∶3H5 level.The multi-phonon relaxation rates（Wmp） of Tm3＋∶3H5→3F4（1.23 μm） and Tm3＋∶3F4→3H6（1.8 μm） in Ge-Ga-Se-CsI glasses were evaluated to be 303 s-1 and 0.30 s-1 Respectively.
出处
《半导体光电》
CAS
CSCD
北大核心
2013年第3期452-455,459,共5页
Semiconductor Optoelectronics
基金
江西省教育厅科技项目(GJJ12240)
