Thulium adulterated germanate laser glass and preparation method thereof

Abstract

The present invention discloses a thulium-doped germanate laser glass and a preparation method thereof, comprising the following component: 45-85 mol% of GeO2, 3-25 mol% of Ga2O3, 5-20 mol% of Li2O, 5-25 mol% of BaO, 0.5-8 mol% of La2O3 and 0.2-6.0 mol% of Tm2O3. The present invention has the advantages that: the Ga2O3 is added into a glass matrix, while the Ga2O3 is used as the other glass net former, which can not only integrate with the original glass net former GeO2 to form a glass net system, but also the structure of the Ga2O3 is similar to that of the Tm2O3 so as to facilitate the Tm2O3 to be easily melted into the glass net system. Thus the obtained thulium-doped germanate laser glass has stable physical and chemical performance without leading to the glass become crisp, phase-separation, devitrification and easily oxidized and so on. The heat stability is higher, the heat stability parameter is not less than 220 DEG C; besides, the cataplexy effect will not occur even if the concentration of the Tm2O3 reaches 2.0 mol%. The present invention has good -2mum mid-infrared laser emitting characteristic and stronger fluorescence intensity, can adapt to the mid-infrared laser device with wider wavelength.

Description

technical field [0001] The invention relates to special glass, in particular to a thulium-germanate-doped laser glass and a preparation method thereof. Background technique [0002] Tm 3+ is the luminous center, Tm 3+ Due to the strong energy cross-relaxation effect between ions ( 3 h 6 , 3 h 4 → 3 f 4 , 3 f 4 ), the quantum efficiency can reach 200% when excited by light; germanate as a glass matrix has a lower phonon energy of 900cm -1 , can effectively inhibit Tm 3+ The radiation-free process greatly improves the Tm 3+ Luminous efficiency in glass; in addition, as a glass matrix, germanate also has stable physical and chemical properties, good optical properties, and high compatibility with rare earth ions; The distance is widely used, and can also be used in environmental detection, bioengineering and medical treatment. [0003] In the glass matrix of thulium-germanate laser glass, Ge compounds are used as glass network formers, oxides of alkali metals and a...

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Problems solved by technology

The glass modifier has the function of providing non-bridging oxygen, making the structure of the glass more open, which is conducive to doping more Tm 3+ ions, in order to increase the Tm in germanate glasses 3+ ion concentration, it is necessary to add a certain amount of glass modifier; but the current doped thulium germanate glass, doping too much modifier will lead to changes in the physical and chemical properties of the glass, making the glass brittle, phase separation, devitrification and Easy to oxidize, etc., which also reduces the thermal stability of the glass; and the doped Tm 3+ Ions are prone to concentration quenching effects at lower concentrations

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