Er^(3+)/Nd^(3+)/Tm^(3+)共掺碲酸盐玻璃近红外发射和能量传递机理  

Near-Infrared Emission and Energy Transfer Mechanism of Er^(3+)/Nd^(3+)/Tm^(3+)Co-Doped Tellurite Glasses

作　　者：陈安民 马飞云 崔令江[2] 张鹏 王传杰[1,2] CHEN An-min;MA Fei-yun;CUI Ling-jiang;ZHANG Peng;WANG Chuan-jie(Weihai Optical Fiber Preform Engineering Research Center,Weihai Changhe Optical Technology Co.,Ltd.,Weihai 264200,China;School of Materials Science and Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China;Department of Technology,Hongan Group Co.,Ltd.,Weihai 264200,China)

机构地区：[1]威海长和光导科技有限公司威海市光纤预制棒工程技术研究中心,山东威海264200 [2]哈尔滨工业大学(威海)材料科学与工程学院,山东威海264209 [3]宏安集团有限公司技术部,山东威海264200

出　　处：《光谱学与光谱分析》2024年第4期1171-1176,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(51875126)资助。

摘　　要：为满足通信网络飞速发展对密集波分复用系统(DWDM)传输容量需求的不断增加,对DWDM系统核心器件掺铒光纤放大器(EDFA)性能的要求也越来越高。碲酸盐玻璃因其具有稀土离子溶解度高,声子能量低和高折射率等优点已成为替代传统掺铒石英光纤的理想材料。掺稀土碲酸盐玻璃可以作为宽带光纤放大器的理想增益介质来实现信号有效放大,因此提高掺铒碲酸盐玻璃光谱性能并拓展其放大带宽对DWDM系统扩容具有重要意义。通过Er^(3+)、Nd^(3+)和Tm^(3+)共同掺杂提高碲酸盐玻璃的放大带宽以获得超宽带发光。Er^(3+)、Nd^(3+)和Tm^(3+)分别通过跃迁产生1.55、1.34和1.85μm波段的发光,且三个近红外发射波段基本相邻。采用三种离子共掺的方式,通过离子间发生能量传递(ET)来实现碲酸盐玻璃在连续光谱中的发光。在TeO_(2)-WO_(3)-ZnO-Na_(2)O-Er_(2)O_(3)碲酸盐玻璃中,先进行Er^(3+)/Nd^(3+)掺杂,分析Er^(3+)/Nd^(3+)间能量传递机理,得到Er_(2)O_(3)、Nd_(2)O_(3)掺杂浓度分别为1、0.1 mol%时玻璃发光强度较佳。再进行不同Tm^(3+)浓度下的Er^(3+)/Nd^(3+)/Tm^(3+)三种离子掺杂,最后采用高温熔融退火法制备得到热稳定性能良好的Er^(3+)/Nd^(3+)/Tm^(3+)掺杂碲酸盐玻璃。Er^(3+)、Nd^(3+)和Tm^(3+)间发生能量传递,在1250~2100 nm范围内产生了发光中心为1.3、1.5和1.8μm的三个波段发光,覆盖了整个O、E、S、C、L和U波段。1.5μm处的荧光半高宽(FWHM)增加到131.68 nm,1.8μm处的FWHM高达251.75 nm。详细分析了三种稀土掺杂时稀土离子之间的能量传递过程机理。光谱结果表明,当Er_(2)O_(3)、Nd_(2)O_(3)、Tm_(2)O_(3)掺杂浓度分别为1、0.1、0.2 mol%时,Er^(3+)/Nd^(3+)/Tm^(3+)三掺碲酸盐玻璃是超宽带光纤放大器设计的一种有效材料。In order to meet the increasing demand for the transmission capacity of Dense Wavelength Division Multiplexing(DWDM)systems due to the rapid development of communication networks,the performance requirements for the core device of the DWDM system,Erbium Doped Fiber Application Amplifier(EDFA),are also getting higher and higher.Tellurite glass has become an ideal material to replace the traditional erbium-doped silica fiber because of its high solubility of rare earth ions,low phonon energy and high refractive index.Rare earth-doped tellurite glass can be used as the ideal gain medium of broadband fiber amplifiers to achieve effective signal amplification.Therefore,improving the spectral performance of erbium-doped tellurite glass and expanding its amplification bandwidth are of great significance for the expansion of the DWDM system.In this paper,Er^(3+),Nd^(3+)and Tm^(3+)are co-doped to improve the amplification bandwidth of tellurite glasses to obtain ultra wideband luminescence.Er^(3+),Nd^(3+),and Tm^(3+)ions can generate luminescence in 1.55,1.34 and 1.85μm bands through the transition,and these three near-infrared emission bands are adjacent to each other.The luminescence of tellurite glass in a continuous spectrum is realized through energy transfer(ET)between ions by means of co-doping of three ions.In TeO_(2)-WO_(3)-ZnO-Na_(2)O-Er_(2)O_(3) tellurite glass,Er^(3+)/Nd^(3+)ions were doped first,and the energy transfer mechanism between Er^(3+)/Nd^(3+)ions was analyzed.It was found that the glass had a better luminous intensity when the concentration of Er_(2)O_(3) and Nd_(2)O_(3) was 1 and 0.1 mol%,respectively.On this basis,Er^(3+)/Nd^(3+)/Tm^(3+)doped tellurite glasses with good thermal stability were prepared by high-temperature melting annealing.Energy transfer occurs between Er^(3+),Nd^(3+)and Tm^(3+)ions,and three luminescence bands with luminescence centers of 1.3,1.5 and 1.8μm are generated in the range of 1250~2100 nm,covering the whole O,E,S,C,L and U bands.The Full Width at Half Maxima(FWHM)incr

关 键 词：碲酸盐玻璃 近红外发光 能量传递 热稳定性能 

分 类 号：TQ171[化学工程—玻璃工业]