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通过测量Tm掺杂氟氧化物玻璃的光吸收谱 ,根据Judd Ofelt理论 ,拟合得到了Tm3+ 离子的J O强度参量Ω2 =1.955× 10 - 2 0 cm2 ,Ω4 =2 .6 2 9× 10 - 2 0 cm2 ,Ω6 =1.2 79× 10 - 2 0 cm2 .利用强度参量 ,给出氟氧化物玻璃中Tm3+ 离子各激发能级的自发辐射跃迁速率、辐射寿命、荧光分支比和积分发射截面等光谱参量的预计值 ,发现许多跃迁振子强度大于 10 - 6 且积分发射截面大于10 - 18cm ,如 (3F ,3H) 4 →3H6 (170 7nm)跃迁的振子强度、积分发射截面分别为 3.593× 10 - 6 ,3.180×10 - 18cm ,若上能级有足够高的量子效率 ,可能实现激光发射 .而蓝光波段1G4 →3H6 (4 6 6nm)跃迁也有较大的振子强度 (1.112× 10 - 6 )和积分发射截面值 (0 .984× 10 - 18cm) .
By measuring the optical absorption spectra of the Tm doped oxyfluoride glass, the JO intensity parameters Ω2 = 1.955 × 10 - 2 0 cm2 and Ω4 = 2.626 × 10 - 2 were obtained by Judd Ofelt theory. 0 cm2, and Ω6 = 1.2 79 × 10 - 2 0 cm2.Using the intensity parameters, the spontaneous radiation transition rate, the radiation lifetimes, the fluorescence branching ratios and the integral emission cross sections of the Tm3 + ions in the oxyfluoride glass were given. (3F, 3H) 4 → 3H6 (1707nm) transitions, the integral emission cross sections are 3.593 × 10-6 , 3.180 × 10 - 18cm, the laser emission may be achieved if the upper level has a sufficiently high quantum efficiency, while the 1G4 → 3H6 (466nm) transition in the blue band also has a larger oscillator strength (1.112 × 10 - 6) Emission section value (0.984 × 10 - 18cm).