Influences of Tm<sub>2</sub>O<sub>3</sub> Doping Concentration on Thermal Stability and Spectroscopic Properties of Germanate Glass

Mengjun Jiao; Xin Wang; Lili Hu

doi:10.3788/CJL201845.0603001

Chinese Journal of Lasers, Volume. 45, Issue 6, 0603001(2018)

Influences of Tm₂O₃ Doping Concentration on Thermal Stability and Spectroscopic Properties of Germanate Glass

Mengjun Jiao^1,2,3, Xin Wang^1,3, and Lili Hu^1,3、*

¹ Research and Development Center of High Power Laser Components, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

² University of Chinese Academy of Sciences, Beijing 100049, China

³ Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Shanghai 201800, China

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Figures & Tables(13)

Fig. 1. (a) DSC curve and (b) anti-crystallization experiment of germanate glass

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Fig. 2. (a) O 1s XPS spectra and (b) O 1s peak binding energy versus rare earth ions doping centration N0 of glass

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Fig. 3. Infrared transmission curve of GF germanate glass with thickness of 5 mm

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Fig. 4. (a) Partial energy level diagram of Tm3+ ion; (b) absorption spectra of Tm3+-doped GF germanate glass

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Fig. 5. (a) Fluorescence spectra and (b) normalized fluorescence spectra of Tm3+-doped germanate glass. The inset in Fig.5(a) shows fluorescence peak intensity at 1470 nm and that in Fig.5(b) shows an enlarged view of fluorescence peak at 1470 nm

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Fig. 6. Absorption and emission cross sections for Tm3+-doped GF5 glass

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Fig. 7. Gain coefficient spectra of 3F4→3H6 transition for Tm3+-doped GF5 glass sample

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Table 1. Thermal stability, density, refractive index, Tm3+ doping concentration of germanate glass samples

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Table 1. Thermal stability, density, refractive index, Tm3+ doping concentration of germanate glass samples

Glass	N₀ /(10²⁰ cm^-3)	T_g /℃	T_x /℃	ΔT /℃	n at 1064 nm	ρ /(g·cm^-3)
GF0.1	0.164	460	644	184	1.7794	5.05
GF2	2.675	467	716	249	1.7802	5.12
GF3	4.322	466	717	251	1.7808	5.11
GF4	5.926	471	718	247	1.7824	5.15
GF5	7.442	471	720	249	1.7825	5.16
GF6	9.281	472	728	256	1.7850	5.19

Table 2. J-O parameters of Tm3+-doped and other germanate glass

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Table 2. J-O parameters of Tm3+-doped and other germanate glass

Glass	Ω₂ /(10^-20 cm²)	Ω₄ /(10^-20 cm²)	Ω₆ /(10^-20 cm²)
GeO₂-PbO^[18]	2.81	0.29	0.86
GeO₂-TeO₂-PbO^[3]	4.27	0.92	0.96
GeO₂-Ga₂O₃-BaO^[5]	5.96	1.4	1.23
GeO₂-PbO-BaO-ZnO-K₂O^[8]	4.55	0.48	0.67
GF0.1	2.36	0.74	0.83
GF2	3.91	0.97	0.86
GF3	3.75	0.93	0.89
GF4	3.80	1.03	0.86
GF5	3.75	1.00	0.85
GF6	3.71	0.92	0.84

Table 3. Spontaneous emission rate, fluorescence branching ratio and radiative lifetime of Tm3+ in GF5 glass

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Table 3. Spontaneous emission rate, fluorescence branching ratio and radiative lifetime of Tm3+ in GF5 glass

Initial state	Final state	λ /nm	A_ed /s^-1	A_md /s^-1	β /%	τ_rad /ms
	³H₄	5056	3.83	0	0.17
³F₃	³H₅	1572	381.56	0	16.73	0.44
	³F₄	1164	52.79	62.27	5.05
	³H₆	684	1779.78	0	78.05
	³H₅	2281	19.25	15.45	2.43
³H₄	³F₄	1512	97.39	0	6.82	0.70
	³H₆	791	1296.10	0	90.75
³H₅	³F₄	4423	5.08	0	1.57
	³H₆	1209	232.36	85.13	98.43	3.10
³F₄	³H₆	1648	280.52	0	100	3.56

Table 4. Radiation lifetime and testing lifetime of 3F4 level and testing lifetime of 3H4 level
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Table 4. Radiation lifetime and testing lifetime of 3F4 level and testing lifetime of 3H4 level
Glass τ_rad /ms τ₁ /ms τ₂ /μs
GF0.1 5.08 4.06 291.30
GF2 3.48 3.20 119.33
GF3 3.63 2.77 55.33
GF4 3.50 2.64 27.88
GF5 3.56 2.21 16.96
GF6 3.65 1.12 10.17

Table 5. Non-radiative transition properties of germanate glass and WET
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Table 5. Non-radiative transition properties of germanate glass and WET
Glass (W₂₁+W₂₀) /s^-1 W_ET /(10^-20 cm³·s^-1)
GF0.1 2028.98 0
GF2 2028.98 1838
GF3 2028.98 3380
GF4 2028.98 5471
GF5 2028.98 7463
GF6 2028.98 8420

Table 6. Tm3+ doping concentration, stimulated emission cross section, radiation lifetime of 3F4 level and WET of glass

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Table 6. Tm3+ doping concentration, stimulated emission cross section, radiation lifetime of 3F4 level and WET of glass

Glass	Tm₂O₃ concentration	σ_e /(10^-21 cm²)	τ₁ /ms	W_ET /(10^-20 cm³·s^-1)
GF5	Mass fraction of 5%,mole fraction of 1.8%,particle number concentration of7.44×10²⁰ cm^-3	5.84	2.21	7463
GeO₂-PbO-BaO-ZnO-K₂O^[7]	Mass fraction of 2%	6.15	1.5	-
GeO₂-TeO₂-PbO^[3]	Mole fraction of 1%	6.5	0.83	938
ZBLAN^[20]	Particle number concentration of5.72×10²⁰ cm^-3	3.5	-	-
GeO₂-Ga₂O-Ba $\begin{matrix} {F_{2}}^{[21]} \end{matrix}$	Mole fraction of 1%	4.07	6.3	-
SiO₂-Al₂O₃-CaO^[26]	Mole fraction of 0.75%	3.62	0.36	338

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Mengjun Jiao, Xin Wang, Lili Hu. Influences of Tm₂O₃ Doping Concentration on Thermal Stability and Spectroscopic Properties of Germanate Glass[J]. Chinese Journal of Lasers, 2018, 45(6): 0603001

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Paper Information

Category: materials and thin films

Received: Dec. 27, 2017

Accepted: --

Published Online: Jul. 5, 2018

The Author Email: Lili Hu (hulili@siom.ac.cn)

DOI:10.3788/CJL201845.0603001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Thermal stability, density, refractive index, Tm3+ doping concentration of germanate glass samples

Table 1. Thermal stability, density, refractive index, Tm3+ doping concentration of germanate glass samples

Table 2. J-O parameters of Tm3+-doped and other germanate glass

Table 2. J-O parameters of Tm3+-doped and other germanate glass

Table 3. Spontaneous emission rate, fluorescence branching ratio and radiative lifetime of Tm3+ in GF5 glass

Table 3. Spontaneous emission rate, fluorescence branching ratio and radiative lifetime of Tm3+ in GF5 glass

Table 4. Radiation lifetime and testing lifetime of 3F4 level and testing lifetime of 3H4 level

Table 4. Radiation lifetime and testing lifetime of 3F4 level and testing lifetime of 3H4 level

Table 5. Non-radiative transition properties of germanate glass and WET

Table 5. Non-radiative transition properties of germanate glass and WET

Table 6. Tm3+ doping concentration, stimulated emission cross section, radiation lifetime of 3F4 level and WET of glass

Table 6. Tm3+ doping concentration, stimulated emission cross section, radiation lifetime of 3F4 level and WET of glass