409 resultados para Robot SCORBOT III - ER
Resumo:
用提拉法成功地生长了6mol%的高浓度掺铒铌酸锂晶体。测量了晶体的两个非偏振方向(X和Z)以及两个偏振方向(π和δ)的吸收光谱。高浓度掺铒铌酸锂晶体的吸收系数高,有利于提高泵浦效率。根据所测的吸收光谱用Judd-Ofelt理论拟合出了Er^3+离子的强度参数Ωλ。所得的均方差结果显示偏振拟合的误差要小于非偏振拟合。利用偏振吸收数据计算了各能级跃迁的自发辐射跃迁几率(AJJ’)、辐射寿命(τ)、荧光分支比(β)和积分发射截面(σp)等参数,对计算结果进行了讨论并与其他文献的报道结果进行了比较。
Resumo:
本试验测试了Er^3+掺杂钨酸铅晶体(PbWO4:Er^3+)的吸收光谱,依据J-O理论,首次计算报道了光谱项特征:J-O强度参数、量子荧光效率、荧光分支比等,Ω2=3.75×10^-20cm^2,Ω4=0.67×10^-20cm^2,Ω6=0.41×10^-20cm^2。计算证实,PWO:Er^3+中几乎有80%的激发能量非辐射跃迁转移致^4I13/2能级,^4I13/2的计算寿命是5200μs,J-O计算显示,在PWO中产生^4I13/2→^4I15/2和发射1.53μm.有高的几率。讨论了不同浓度E
Resumo:
采用传统无压烧结工艺制备了Er^3+/Yb^3+共掺的氧化镧钇透明陶瓷并对其光谱性能进行了研究.样品具有较大的吸收和发射截面.La2O3的添加使样品的荧光寿命(τs)与玻璃接近,当Yb^3+和Er^3+的掺杂量分别为5at%和0.5at%时,测得τs=9.65ms.这种荧光寿命长、发射截面大和线宽窄的特性有利于微型、可集成化和大功率激光输出的实现.
Resumo:
Er3+ -doped Gd2SiO5 (Er:GSO) single crystal with dimensions of circle divide 35 x 40 mm(3) has been grown by the Czochralski method. The absorption and fluorescence spectra of the Er:GSO crystal were measured at room temperature. The spectral parameters were calculated based on Judd-Ofelt theory, and the intensity parameters Omega(2), Omega(4) and Omega 6 are obtained to be 6.168 x 10(-20), 1.878 x 10(-20), and 1.255 x 10(-20) cm(2), respectively. The emission cross-section has been calculated by Fuechtbauer-Ladenbury formula. (c) 2007 Elsevier B.V. All rights reserved.