【摘要】 制备了掺钕螯合物的聚合物阶跃型光纤.研究三价钕离子在钕螯合物掺杂的聚甲基丙烯酸甲酯(PMMA)中的吸收光谱和发射光谱.根据Judd-Ofelt理论,用吸收光谱计算钕离子在PMMA中的光学跃迁的强度参量:Ω2=33.967×10-20cm2,Ω4=4.465×10-20cm2,Ω6=3.942×10-20cm2.用该参量计算钕离子激发态(4F3/2)的辐射跃迁几率(2167.4s-1)和辐射寿命(461.4μs),同时计算了受激发射截面σij(4F3/2→4I11/2)和荧光分支比β(4F3/2→4IJ′).分析表明,Nd(DBM)3掺杂的PMMA可望用于聚合物光纤放大器和激光器.更多还原

【Abstract】 An Nd-chelate-doped step-index polymer optical fiber （POF） is fabricated.Absorption and emission spectra of Nd³⁺ ions in Nd（DBM）₃-doped polymethyl methacrylate （PMMA） have been investigated.The optical intensity parameters of Nd³⁺ in PMMA were calculated by Judd-Ofelt theory using the absorption spectrum:Ω₂=33.967×10^-20cm²,Ω₄=4.465×10^-20cm²,Ω₆=3.942×10^-20cm².The optical intensity parameters have been used to calculate the radiative transition rate (2167.4 s^-1) and radiative lifetime （461.4 μs） of the⁴F_3/2 exciting state.The stimulated emission cross-sections σ_ij (⁴F_3/2→⁴I_11/2) and the fluorescence branch rations β for the⁴F_3/2→⁴I_J′ transitions are also calculated.Analysis reveals that Nd（DBM）₃-doped PMMA is promising for use in polymer optical fiber amplifier and laser.更多还原