碱金属对磷酸盐钕玻璃光谱性质影响的结构模拟研究  

Statistical Structure Gene Modeling of Alkali to Spectroscopic Properties of Nd∶Phosphate Glass

作　　者：厚月春 戴晨 张丽艳[1] Hou Yuechun;Dai Chen;Zhang Liyan(Key Laboratory of Materials for High Power Laser,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;College of Materials Science and Engineering,Hunan University,Changsha 410082,Hunan,China)

机构地区：[1]中国科学院上海光学精密机械研究所高功率激光单元技术实验室,上海201800 [2]中国科学院大学材料科学与光电工程中心,北京100049 [3]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《中国激光》2023年第22期175-185,共11页Chinese Journal of Lasers

基　　金：中国科学院战略性先导科技专项(XDA25020000)。

摘　　要：玻璃结构基因模拟法可以实现在有限数据下对玻璃性质及玻璃成分的准确模拟及设计。针对碱金属(Li_(2)O、Na_(2)O)改性的磷酸盐钕玻璃,笔者采用玻璃结构基因模拟法,建立了玻璃红外结构基团(S)、玻璃成分(C)与多种性质(P)间的结构-性质(S-P)模型、成分-结构(C-S)模型及成分-结构-性质(C-S-P)模型。模拟结果显示,受激发射截面(σ_(emi))、有效线宽(Δλ_(eff))、荧光寿命(τ_(f))及Judd-Ofelt参量(Ω_(2)、Ω_(4)、Ω_(6))等关键性质的模拟精度皆较为理想。采用混合碱样品PLN对模型进行了实验验证,结果表明,样品各项性质的预测值与实测值匹配较好且二者之间的相对误差均小于0.6%。Objective Nd∶phosphate laser glass has been studied as a gain medium in high-power laser systems at the National Ignition Facility(USA),Laser Mégajoule(France),and SG-Ⅱ and SG-Ⅲ facilities(China).To meet the growing demand for higher gain in highpower laser systems,the performance of Nd∶glass must be improved to a new level(spectroscopic,thermal,chemical,and mechanical properties).The responses of many properties,as well as the network structure,to changes in glass composition are often highly nonlinear.Traditional empirical design methods can no longer satisfy the requirements of new developments in a timely manner.The objective of this study is to establish an accurate glass modeling system that can be used as a platform for the designs and property predictions of Nd∶phosphate laser glass;the modeling system is called glass structure gene modeling(GSgM)or statistical composition-structure-property(C-S-P)modeling.Methods Using information of the glass network structure as a“bridge”,C-S-P methodology transforms the need of solving a complex or unknown nonlinear relationship of C-P to solving two linear relationships of C-S and S-P,and the structure component(S)bridges the two linear parts into one.Separate linear C-S and S-P models were established using the Cornell first-order linear mixture formula.In this study,the glass design was based on 60P_(2)O_(5)-24K_(2)O-9Mg_(O)-5Al_(2)O_(3)-2R_(2)O_(3)(R=Y,La,and Sb)with 1%(mole fraction)Nd_(2)O_(3) by introducing extra Li_(2)O or Na_(2)O,targeting the glass property responses to Li_(2)O and Na_(2)O,covering mole fraction of 2%,4%,6%,and 8%.The series of Li_(2)O and Na_(2)O samples were called as PL1-4 and PN1-4,respectively(Table 1).This study focused on the effects of Li_(2)O and Na_(2)O on glass spectroscopic properties(Table 2),including emission cross section(σ_(emi)),effective linewidth(Δλ_(eff)),fluorescence lifetime(τ_(f)),and Judd-Ofelt parameters(Ω_(2),Ω_(4),and Ω_(6)).Structural information of the glass network was derived from Fourier

关 键 词：光谱学 光谱性质 统计结构模拟 混合碱 

分 类 号：TQ171.11[化学工程—玻璃工业]