Nd^(3+)离子掺杂氧化物玻璃的光谱性质  

Optical properties of Nd^(3+) ion doped in oxide glasses

作　　者：王雪俊[1] 夏海平[1] 

机构地区：[1]宁波大学光电子功能材料重点实验室,浙江宁波315211

出　　处：《光学技术》2007年第5期684-687,共4页Optical Technique

基　　金：浙江省自然科学基金资助项目(502164);宁波市博士基金资助项目(2005A610010);宁波大学校基金资助项目(xk200418)

摘　　要：高温熔融法制备了69.5B2O3-20Li2O-(10-χ)CaO-χPbO-0.5Nd2O3(χ=1,3,5,7,mol%)和68.5Li2O-(29-φ)CaO-φAl2O3-2La2O3-0.5Nd2O3(φ=3,7,10,15,mol%)玻璃,测量了玻璃样品的吸收和发射光谱(800nm激光二极管激发),从吸收光谱出发,应用Judd-Ofelt理论获得了Nd3+光学跃起的强度参数。根据强度参数和发射光谱,计算了Nd3+离子4F3/2→4I11/2跃迁的荧光发射截面σe。结果显示,在B2O3-Li2O-CaO-PbO-Nd2O3系统中随着CaO的减少和PbO的增加,Nd3+离子的强度参数Ω2增大,表明样品的对称性降低;强度参数Ω6也增大,说明玻璃样品中Nd-O键的共价性和键强降低;同时,Nd3+离子4F3/2→4I11/2跃迁的荧光发射截面σe的大小和荧光强度都减小。在Li2O-CaO-Al2O3-La2O3-Nd2O3系统中,随着CaO的减少和Al2O3的增加,Nd3+离子的强度参数Ω2减小,说明样品的对称性增加;强度参数Ω6减小,说明玻璃样品中Nd-O键的共价性和键强增强;同时,Nd3+离子4F3/2→4I11/2跃迁的荧光发射截面的大小和荧光强度也都减小。The 69.5B2O3-20Li2O-（ 10-χ ） CaO-χPbO-0.5Nd2O3 （ χ = 1,3,5,7. mol% ） and 68.5Li2O-（29-φ ） CaO- φAl2O3-2La2O3-0.5Nd2O3（ φ = 3,7,10,15. mol% ） glasses were prepared by conventional melting method with the measurements of their absorption and emission spectra （800nm LD excitation）. The Judd-Ofelt parameters were calculated from their absorption spectra. The stimulated emission cross-sections between the metastable 4^F3/2 and terminal 4^I1/2 of Nd^3＋ ions were obtained from their emission spectra with the help of J-O parameters. It was obtained from the results that, concomitant with the decrease of CaO and increase of PbO contents in glass system： B2O3-Li2O-CaO-PbO-Nd2O3 were increase of the intensity parameters Ω2 and Ω6, which indicated that the symmetry of the glass host become lower the band of Nd and O atoms became stronger and the covalency of Nd and O atoms increased, the emission intensity and the emission cross-sections decreased as well; Besides, along with the decrease of CaO and increase of Al2O3 contents in glass system; Li2O-CaO-Al2O3-La2O3-Nd2O3, were the increase of the intensity parameters Ω2 and Ω6, which indicated that the symmetry of the glass host become higher the band of Nd and O atoms became weaker and the covalency of Nd and O atoms decreased, the emission intensity and the emission cross-sections decreased as well.

关 键 词：Nd^3+掺杂 J-O理论 强度参数 受激发射截面 

分 类 号：TQ171[化学工程—玻璃工业]