【摘要】 采用蒸馏提纯工艺制备了五组不同Er3+离子掺杂浓度的Ge-Ga-S-CsI玻璃样品,测试了样品的折射率、红外透过光谱,以及800nm激光泵浦下样品在2.85μm处的中红外荧光光谱和荧光寿命,计算了样品中OH?在3μm处的红外吸收系数以及Er3+离子与OH?基团相互作用的强度参量KOH-Er,讨论了OH?根杂质对样品中红外荧光特性的影响.结果表明:蒸馏提纯工艺能有效降低玻璃样品中的OH?残留量,增强Er3+离子2.85μm中红外荧光强度和荧光寿命.计算得到KOH-Er值为1.08×10?16cm4/s,由于Er3+离子与OH?之间单声子能量转移的高效性,残存的少量OH?基团仍会影响2.85μm荧光的强度.更多还原

【Abstract】 A series of Er3+-doped chalcogenide glasses based on Ge-Ga-S-CsI system were prepared by melt-quenching technique with distillation processing.Properties including refractive index,infrared transmission spectra,2.85μm mid-infrared emission spectra and fluorescence lifetime under 800 nm laser excitation were measured.The infrared absorption coefficients of OH- groups at 3μm according to the infrared transmission spectra were calcu-lated,and the constant KOH-Er,determined by the strength of interactions between Er3+ ions and OH- groups in the case of energy transfer was also calculated.The effect of hydroxyl content on mid-infrared emission properties of glass samples was discussed.The results show that the remnants OH- content of glass samples can be effectively reduced by the distillation processing.The 2.85μm mid-infrared fluorescence emission intensity and fluorescence lifetime of Er3+ ions are also enhanced.The calculated constant KOH-Er is about 1.08×10-16cm4/s.Because of the efficiency of energy transfer between Er3+ ions and OH- groups,the remnants of a small amount of OH- groups can still directly affect the intensity of 2.85μm fluorescence.更多还原