摘要
采用高温熔融法制备了掺Er3+:TeO2-SiO2-Na2O系列玻璃样品.测试了样品中Er3+的发射光谱和吸收光谱.利用Judd-Ofelt理论计算了Judd-Ofelt强度参数Ωλ(λ=2,4,6)、Er3+各能级间跃迁的振子强度、跃迁几率、荧光分支比和辐射寿命等参数.利用测得的发射光谱计算了Er3+:4I13/2→4I15/2的荧光半高全宽(FWHM)值,其数值最大为63nm.讨论了强度参数Ω6值与FWHM的关系及SiO2的含量对碲酸盐玻璃的光谱参数和光谱特性影响.结果表明,可以通过调整基质玻璃的组分来增加Ω6值,进而增强Er3+的1.5μm处的发射带宽.适量的SiO2的引入,提高了玻璃基质中Er-O键的共价性和玻璃刚性,使Er3+:4I13/2的辐射寿命最大值达到3.1ms,同时还改善了Er3+的光谱性质,使得其玻璃基质更适合作为实现宽带放大和高增益放大的基质材料.
According to the Judd -Ofelt theory,The new Er^3＋-doped TeO2 -SiO2 -Na2O glasses was prepared by the technique of high - temperature melting, t6he spectral properties, such as the absorption spectra, the fluorescence spectra have been measured, investigated, the Judd - Ofelt intensity parameters, fluorescence lifetime and oscillator strength and spontaneous emission probability and radiative lifetime and emission branching ratio of several Er^3＋ transitions were calculated The bandwidth properties at 1.5μm of the samples are discussed used to the fluorescence full width at half maximum （FWHM = 45 -63 nm）. The dependence of the Ω6 on the FWHM and the effect of SiO2 content of the spectrum parameter and the spectrum characteristic of the TSN glass samples were discussed. The results demonstrate that the SiO2 what had been introduced into tellurite glass make the bond covalence of Er - O and rigidity of glass in glasses enhance and make the radiate lifetime of Er^3＋ ：^4I13/2 increase and make the spectrum characteristic of Er^3＋ improve. The results showed that TSN glass can be uses as an potential optical amplifier for the wavelength -division -multiplexing （WDM） network system.
出处
《哈尔滨师范大学自然科学学报》
CAS
2008年第1期26-30,共5页
Natural Science Journal of Harbin Normal University
基金
黑龙江省教育厅科学技术研究项目(11511130)
哈尔滨市科技局创新人才研究基金项目(2006RFQXG057)
哈尔滨师范大学科研基金(KM2005-07)
