【摘要】 研究了纳米相氟氧化物玻璃陶瓷Tm(0.35)Yb(5)∶FOV在975nm半导体激光激发下的上转换发光。发现了位于363.6,(462.6,477.0),648.7,(699.7,680.7)和(777.6,800.7nm)的几条上转换发光线,它们是Tm3+离子的1D2→3H6,1G4→3H6,1G4→3F4,3F3→3H6和3H4→3H6的荧光跃迁。为了确认它们的上转换机理,还测量了上转换发光强度F随975nm泵浦激光功率P改变的双对数曲线,结果证实了1D2能级的上转换发光部分是五光子上转换发光,而1G4能级和3H4能级的上转换发光则是三光子和双光子上转换发光。更多还原

【Abstract】 The upconversion luminescence of nanophase oxyfluoride vitroceramics Tm(0.35)Yb(5)∶FOV when excited by a 975 nm diode laser was studied in the present paper.Several ultraviolet upconversion luminescence lines positioned at 363.6 nm,(462.6 nm,477.0 nm),648.7 nm,(699.7 nm,680.7 nm) and(777.6 nm,800.7 nm) were found.They can be attributed to the fluorescence transitions of 1D2→3H6,1G4→3H6,1G4→3F4,3F3→3H6 and 3H4→3H6 of Tm3+ ion.The careful measurement and analysis of the variation of upconversion luminescence intensity F as a function of the 975 nm pumping laser power P has proven that the upconversion luminescence of 1D2 state is partly a five-photon upconversion luminescence,while the upconversion luminescence of 1G4 and 3H4 state is the three-photon and two-photon upconversion luminescence respectively.更多还原