Thermal and luminescent properties of 2 μm emission in thulium-sensitized holmium-doped silicate-germanate glass

Rong Chen; Ying Tian; Bingpeng Li; Xufeng Jing; Junjie Zhang; Shiqing Xu; Hellmut Eckert; Xianghua Zhang

doi:10.1364/PRJ.4.000214

Journals >Photonics Research >Volume 4 >Issue 6 >Page 214 > Article

Photonics Research
Vol. 4, Issue 6, 214 (2016)

Thermal and luminescent properties of 2 μm emission in thulium-sensitized holmium-doped silicate-germanate glass

Rong Chen¹, Ying Tian^2、*, Bingpeng Li¹, Xufeng Jing², Junjie Zhang¹, Shiqing Xu^1、3, Hellmut Eckert⁴, and Xianghua Zhang⁵

Author Affiliations

¹College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China

²Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China

³email:sxucjlu@163.com

⁴Institut für Physikalische Chemie, WWU Münster, Corrensstra?e 30, D 48149 Münster, Germany

⁵Laboratory of Glasses and Ceramics, UMR 6226 CNRS-University of Rennes Cedex 135042, France

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DOI: 10.1364/PRJ.4.000214 Cite this Article Set citation alerts

Rong Chen, Ying Tian, Bingpeng Li, Xufeng Jing, Junjie Zhang, Shiqing Xu, Hellmut Eckert, Xianghua Zhang. Thermal and luminescent properties of 2 μm emission in thulium-sensitized holmium-doped silicate-germanate glass[J]. Photonics Research, 2016, 4(6): 214 Copy Citation Text

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Fig. 1. Deconvolution of Raman spectrum of SG glass using symmetric Gaussian functions.

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Fig. 2. Absorption spectra of Tm3+ single-doped and Tm3+/Ho3+ co-doped silicate-germanate glasses in the range of 400–2200 nm.

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Fig. 3. Fluorescence spectra of the Tm3+/Ho3+ co-doped silicate-germanate glasses.

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Fig. 4. Energy level diagrams and energy transfer sketch map of Tm3+ and Ho3+ ions.

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Fig. 5. Emission cross sections of silicate-germanate glasses doped with 1.5 mol% Tm2O3 and 1 mol% Ho2O3.

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Fig. 6. (a) Fluorescence decay curve of Tm3+/Ho3+ co-doped glass sample from Tm3+:F43→H63. Inset shows the decay curve of Tm3+ singly doped glass sample. (b) Fluorescence decay curve of Tm3+/Ho3+ co-doped glass samples from Ho3+:I75→I85.

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Samples	Glass Compositions (mol%)
S0	$60 {SiO}_{2} - 20 (CaO + {Li}_{2} O) - 5 {Nb}_{2} O_{5} - 15 BaO$
SG	$30 {SiO}_{2} - 30 {GeO}_{2} - 20 (CaO + {Li}_{2} O) - 5 {Nb}_{2} O_{5} - 15 BaO$
SGT1	$30 {SiO}_{2} - 30 {GeO}_{2} - 20 (CaO + {Li}_{2} O) - 5 {Nb}_{2} O_{5} - 15 BaO - 0.5 {Tm}_{2} O_{3}$
SGT2	$30 {SiO}_{2} - 30 {GeO}_{2} - 20 (CaO + {Li}_{2} O) - 5 {Nb}_{2} O_{5} - 15 BaO - 1.5 {Tm}_{2} O_{3}$
SGTH1	$30 {SiO}_{2} - 30 {GeO}_{2} - 20 (CaO + {Li}_{2} O) - 5 {Nb}_{2} O_{5} - 15 BaO - 1 {Ho}_{2} O_{3} - 0.5 {Tm}_{2} O_{3}$
SGTH2	$30 {SiO}_{2} - 30 {GeO}_{2} - 20 (CaO + {Li}_{2} O) - 5 {Nb}_{2} O_{5} - 15 BaO - 1 {Ho}_{2} O_{3} - 1.5 {Tm}_{2} O_{3}$

Table 1. Compositions of the Prepared Glasses

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Sample	Parameter	Value
S0	Density $ρ$ ( $g / {cm}^{3}$ )	3.36
S0	Refractive index $n_{D}$	1.61
SG	Density $ρ$ ( $g / {cm}^{3}$ )	3.56
SG	Refractive index $n$	1.69
SGTH	Refractive index $n$	1.70
	$T_{g}$ (°C)	585
	$T_{x}$ (°C)	740
	$Δ T$ (°C)	155
	Sample thickness (mm)	1.50

Table 2. Physical and Thermal Properties of Silicate-Germanate Glasses

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Samples	$Ω_{2}$	$Ω_{4}$	$Ω_{6}$	Trend	Reference
SGTH2	6.5	2.61	0.33	$Ω_{2} > Ω_{4} > Ω_{6}$	This work
Tellurite	5.21	2.28	2.18	$Ω_{2} > Ω_{6} > Ω_{4}$	[14]
Silicate	5.20	1.80	1.20	$Ω_{2} > Ω_{4} > Ω_{6}$	[40]
Phosphate	3.33	3.01	0.61	$Ω_{2} > Ω_{4} > Ω_{6}$	[40]
Fluoride	1.86	1.90	1.32	$Ω_{2} > Ω_{6} > Ω_{4}$	[41]
Fluorophosphate	3.23	2.71	1.82	$Ω_{2} > Ω_{4} > Ω_{6}$	[42]
Germanate	6.60	1.75	0.99	$Ω_{2} > Ω_{4} > Ω_{6}$	[43]

Table 3. J-O intensity Parameters (Ωλ, λ=2, 4, 6) (×10−20 cm2) of Ho3+ Ions in Various Glass Hosts

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Transition	Energy ( ${cm}^{- 1}$ )	$A_{rad} (s^{- 1})$	$β$ (%)	$τ_{rad}$ (ms)
${}^{5}{I_{7}} \to {}^{5}{I_{8}}$	5139	103.46	100	9.67
${}^{5}{I_{6}} \to {}^{5}{I_{8}}$	8681	155.77	84.20	5.41
${}^{5}{I_{6}} \to {}^{5}{I_{7}}$	3321	29.23	–	–
${}^{5}{I_{5}} \to {}^{5}{I_{8}}$	11187	61.66	37.51	6.08
${}^{5}{I_{5}} \to {}^{5}{I_{7}}$	6046	82.36	–	–
${}^{5}{I_{5}} \to {}^{5}{I_{6}}$	2726	20.37	–	–
${}^{5}{F_{5}} \to {}^{5}{I_{8}}$	15528	2039.53	77.33	0.38
${}^{5}{F_{5}} \to {}^{5}{I_{7}}$	10384	1215.8	–	–
${}^{5}{F_{5}} \to {}^{5}{I_{6}}$	7067	178.8	–	–
${}^{5}{F_{5}} \to {}^{5}{I_{5}}$	4342	14.4	–	–

Table 4. Spontaneous Transition Probability Arad, Branching Ratio β, and Radiative Lifetime τrad for Different Excited Levels of Ho3+ in Silicate-Germanate Glass

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Glasses	FWHM(nm)	$σ_{e}^{peak}$ ( $10^{- 21} {cm}^{2}$ )	$τ_{m} (ms)$	$σ_{e}^{peak} \times FWHM$ ( $10^{- 28} {cm}^{3}$ )	$σ_{e}^{peak} \times τ_{m}$ ( $10^{- 21} {cm}^{2} \cdot ms$ )	Reference
SGTH2	153	4.78	9.67	731.34	46.22	This paper
Silicate	82	7.0	0.32	574	2.24	[8]
Germanate	84	4.0	0.36	336	1.44	[8]
Gallate	141	3.8	8.2	535.8	31.16	[8]
Fluoride	118	5.3	26.7	625	141.51	[8]
Tellurite	–	10.7	2.2	–	23.54	[11]