掺Er^(3+)钆硼硅酸盐玻璃及玻璃陶瓷的红外发光特性和热稳定性

Infrared Spectra and Thermal Stability of Er^(3+)-doped Gadolinium Borosilicate Glasses and Glass Ceramics

报道了一种新型可作为掺铒光纤放大器(EDFA)基质材料的Er3+掺杂B2O3 SiO2 Gd2O3 Na2O(BSGN)体系玻璃及其玻璃陶瓷。对材料中铒的4I13/2→4I15/2跃迁的1.5μm发射光谱、吸收光谱、时间分辨光谱及寿命进行了测量和分析,讨论了热处理对玻璃材料带宽和寿命的影响。结果表明,铒掺杂玻璃1.5μm发射的带宽和J O参数Ω6都随B2O3含量的增加而增加,寿命随B2O3含量的增加而减小。经过热处理后得到的玻璃陶瓷比具有相同组分的玻璃具有更高的1.5μm发射效率。同时,差热分析的数据表明,该玻璃体系具有极好的热稳定性。

In recent years, Er^(3+)-doped glasses with a broad 1.5 μm emission band have been extensively investigated for obtaining erbium-doped fiber amplifiers (EDFA) with a wide and flat gain spectrum in the telecommunication window, to be used in dense wavelength division multiplexing (DWDM) optical network systems. In this paper, Er^(3+)-doped B_2O_3-SiO_2-GD_2O_3-Na_2O (BSGN) glasses were prepared by the technique of high-temperature melting at different temperature. The 1.5 μm emission spectra responsible to ()~4I_(13/2)→()~4I_(15/2) transition of Er^(3+) at 17 K and room temperature, absorption spectra, time resolved spectra and lifetime of the ()~4I_(13/2) state are measured and investigated, respectively. Both the bandwidth of the 1.5 μm emission and the J-O parameter Ω_6 of Er^(3+) in the BSGN glasses increase with the increasing of B_2O_3 content, and their lifetime decreased. A broad 1.5 μm emission band with bandwidth of more than 80 nm is obtained. The glass ceramics were obtained by the heat treatment for the previous glasses at different temperature above its glass transition temperature (T_g), they show different emission spectral shapes from the corresponding glasses. The measured time decay pattern of the 1.5 μm emission in the glass ceramic consists of a fast and a slow component, which are attributed to the glass phase and the crystalline phase, respectively, indicating higher 1.5 μm emission efficiency in crystalline phase than that in glass phase. Differential thermal analysis result (DTA) also demonstrates high thermal stability of the BSGN glasses. Crystallization by heat treatment is helpful to increasing emission efficiency of the 1.5 μm emission band. The Er^(3+)-doped BSGN glasses are the promising materials for the EDFA in the 1.5 μm window of optical telecommunication system.