Blue upconversion luminescence for Yb3+ and Tm3+ co-doped borosilicate glasses

• 作 者: YuYang;YingboChu;JinggangPeng;NengliDai;JinyanLi;LuyunYang;
• 机 构: 华中科技大学,武汉国家光电实验室,武汉 430074
• 出 处: 第八届中国功能玻璃学术研讨会暨新型光电子材料国际论坛
• 发表日期: 2015年期

　　We report on the blue upconversion luminescence for Yb3+ and Tm3+ co-doped borosilicate glasses under near-infrared light excitation at 980nrn.The luminescence spectra shows that the blue upconversion luminescence originates from the transition of Tm3+: 1G4→3H6.The dependence of luminescent intensity of Tm3+:1G4 on pumping power reveals that the conversion of blue radiation is dominated by a three-photon absorption process.It is suggested that a sequential three-photon absorption process promotes the Tm3+ to upper excited states,creating the characteristic blue emission from 1G4 state of Tm3+.The energy transferprocessfrom Yb3+ to Tm3+ was analyzed.The energy transfer efficiency is estimated up to 51%according to measured fluorescence decay of Yb3+.