摘要
以正硅酸乙酯与γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷为前驱体,应用溶胶-凝胶技术,合成了Tm3+离子掺杂的有机-无机复合材料。从吸收光谱特性出发,应用Judd-Ofelt理论,计算得到了Tm3+离子的J-O强度参量(Ω2,Ω4,Ω6)及Tm3+离子各激发能级的自发辐射跃迁概率、荧光分支比及辐射寿命等光谱参量。根据McCumber理论计算了Tm3+离子能级3H6←→3F4(1.8μm)跃迁的吸收截面和受激发射截面,同时,根据所获得的吸收截面、发射截面以及掺杂离子浓度等参数获得了Tm3+离子在凝胶玻璃中的增益截面函数。与其它玻璃掺杂基质比较可知,Tm3+掺杂的有机改良硅酸盐玻璃在～1.8μm和～2.0μm波段的中红外激光中有潜在的应用前景。
Tm3＋ doped organic-inorganic materials were fabricated with ethyl silicate and 3-glycidyloxypropy-trimethoxysilane as precursors by sol-gel method.According to the Judd-Ofelt theory,the Judd-Ofelt strength parameters（Ω2,Ω4,Ω6）were calculated in terms of the characteristics of the absorption spectra and the physical-chemical properties.Meanwhile,according to the McCumber theory,the absorption and stimulate emission cross-section corresponding to the 3H6← →3F4（1.8 μm） transition of Tm3＋ were also calculated.The gain cross section was calculated by using the emission cross-section,absorption cross-section and Tm3＋ concentration.These Tm3＋-doped organic-inorganic materials would have a potential application in mid-infrared lasers at about 1.8 and 2.0 μm wavelength.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2012年第11期1209-1214,共6页
Chinese Journal of Luminescence
基金
国家自然科学基金(50972061
51272109
61275180)
浙江省自然科学基金(R4100364
Z4110072)
宁波市自然科学基金(2012A610115)
宁波大学王宽诚幸福基金资助项目
