Tm3+掺杂Bi2O3-SiO2-PbO玻璃的~2 μm发光光谱性质

doi:10.3724/SP.J.1077.2013.12219

摘要/Abstract

摘要：

用高温熔融法制备了Tm₂O₃摩尔掺杂浓度分别为0.1%、0.25%、0.5%、0.75%和1%的33Bi₂O₃-50SiO₂-17PbO玻璃。采用DSC方法对该种玻璃的析晶性能进行研究, 发现其T_x-T_g为138℃, 说明该玻璃抗析晶性能良好。基于其吸收光谱, 采用Judd-Ofelt理论计算了Tm³⁺离子的J-O参数和部分激发态能级的跃迁几率、荧光寿命和分支比等光谱参量。分析³F₄能级寿命随掺杂浓度变化关系, 发现产生自淬灭的临界浓度为3.54×10²⁰ions/cm³。用McCumber理论计算在33Bi₂O₃-50SiO₂-17PbO玻璃中Tm³⁺离子³F₄→³H₆能级跃迁的吸收截面和发射截面, 最大吸收截面和最大受激发射截面分别为3.7×10^-21和7.2×10^-21cm²。研究结果表明33Bi₂O₃-50SiO₂-17PbO玻璃具有较好的光谱性质, 是一种实现~2 μm激光的较理想玻璃基质。

关键词: 铋硅酸盐玻璃, Tm³⁺掺杂, 光谱性质

Abstract:

Silicate glasses 33Bi₂O₃-50SiO₂-17PbO doped with 0.1%,0.25%, 0.5%, 0.75% and 1% Tm₂O₃ were prepared by the conventional melting method. Thermal property was studied by the DSC (Differential Scanning Calorimeter) method. Its T_x-T_g value is 138℃. According to the absorption spectra and Judd-Ofelt theory, J-O strength parameters, radiative transition properties, the radiative lifetimes and the branching ratio of some excited state energy levels were calculated. Analysis on the relationship between ³F₄ lifetime and Tm³⁺ doped concentration showed that the critical concentration for self-quenching is 3.54×10²⁰ions/cm³. The absorption and emission cross-sections of Tm³⁺:³F₄→³H₆ transition were obtained using McCumber theory. The maximum absorption cross-section is 3.7×10^-21cm² at 1658 nm and the maximum emission cross-section is 7.2×10^-21cm² at 1842 nm. The results show that Tm³⁺ doped 33Bi₂O₃-50SiO₂-17PbO material is an ideal candidate to realize ~2 μm laser.

Key words: bismuth-lead-silicate glass, Tm³⁺ doping, spectral properties

中图分类号:

TQ171

王欣, 李科峰, 凡思军, 白功勋, 胡丽丽. Tm³⁺掺杂Bi₂O₃-SiO₂-PbO玻璃的~2 μm发光光谱性质[J]. 无机材料学报, 2013, 28(2): 165-170.

WANG Xin, LI Ke-Feng, FAN Si-Jun, BAI Gong-Xun, HU Li-Li. Spectral Properties of ~2 μm Emission of Tm³⁺ Doped Bi₂O₃-SiO₂-PbO Glass[J]. Journal of Inorganic Materials, 2013, 28(2): 165-170.

图/表 8

图1 Tm3+在铋硅铅玻璃中的吸收光谱

Fig. 1 Absorption spectra of Tm3+-doped lead bismuth siliacate glasses

Table 1 J-O strength parameters of Tm3+ in different glasses /(×10-20, cm-2)

Glass	J-O parameters/(×10^-20,cm^-2)
	Ω₂	Ω₄	Ω₆
This work	3.01	1.65	1.07
ZBLAN^[7]	1.96	1.36	1.16
Silica^[7]	6.23	1.91	1.36
TWL30^[15]	4.48	1.77	1.39
GeO₂-Ga₂O₃-Bi₂O₃-PbO^[16]	2.84	0.5	0.75

Table 2 Radiative transition rates, branching ratio and radiative life for different energy levels

Initial state	Final state	λ/nm	A_ed/s^-1	A_md/s^-1	β	τ_c/ms
³F_2,3	³H₄	5126	1.92	0	0.001	0.35
	³H₅	1588	286.14	0	0.101
	³F₄	1170	15.41	117.36	0.047
	³H₆	686	2400.26	0	0.851
³H₄	³H₅	2300	20.00	19.22	0.050	1.28
	³F₄	1516	22.76	0	0.029
	³H₆	792	734.04	0	0.945
³H₅	³F₄	445	5.81	0	0.019	3.31
	³H₆	1208	166.76	129.82	0.981
³F₄	³H₆	1729	432.99	0	1	2.62

图2 掺Tm3+铋硅铅玻璃的荧光光谱

Fig. 2 Fluorescence spectra of the lead bismuth silicate glasses

图3 掺Tm3+铋硅铅玻璃的归一化荧光光谱

Fig. 3 Normalized fluorescence spectra of the lead bismuth silicate glasses

Table 3 Measured lifetime and quantum efficiency

	G1	G2	G3	G4	G5
N/(10²⁰ions·cm^-3)	0.35	0.88	1.75	2.63	3.51
τ_m/μs	1534	1321	1030	789	588
η/%	58.5	50.4	39.3	30.1	22.4

图4 3F4能级寿命随Tm3+离子浓度变化关系

Fig. 4 Relationship between lifetime of 3F4 and Tm3+ concentration

图5 N×τ(N)随离子浓度的变化关系曲线

Fig. 5 The product N×τ(N) for different Tm3+ concentration

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Tm³⁺掺杂Bi₂O₃-SiO₂-PbO玻璃的~2 μm发光光谱性质

Spectral Properties of ~2 μm Emission of Tm³⁺ Doped Bi₂O₃-SiO₂-PbO Glass

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