碱金属和碱土金属氟化物对掺Er^3＋氟磷酸盐玻璃光谱性质的影响

研究了碱金属和碱土金属离子修饰的掺Er^3＋氟磷酸盐玻璃的光谱性质，讨论了碱金属和碱土金属对铒氟磷玻璃的吸收和发射截面、荧光半高宽，Judd-Ofelt强度参数和上转换发光强度等光谱性质的影响，并与一些传统氧化物玻璃系统进行了比较．研究表明碱金属K^＋和碱土金属Sr^2＋掺杂高的玻璃更适宜用作光放大器基质．含12mol％K^＋的氟磷玻璃展现出7．83×10^-21cm^2的高发射截面和最小的荧光上转换强度；含23mol％Sr^2＋的氟磷玻璃则有7．58×10^-21cm^2的高发射截面、65nm的荧光半高

This paper reports the spectroscopic properties of Er3+-doped Al (PO3)(3)-based fluorophosphate glasses for 1.5 mu m optical amplifiers. Effects of alkaline/alkaline-earth metal composition on the spectroscopic properties of Er3+ in fluorophosphate glasses are investigated. A strong correlation between the alkaline/alkaline- earth metal content and the spectroscopic parameters, such as absorption and emission cross sections, Judd-Ofelt intensity parameters and upconversion emission intensity, has been observed. The fluorophosphate glass with 12 mol% potassium fluoride exhibits the largest calculated stimulated-emission cross-section of 7.83 x 10(-21) cm(2) and the smallest upconversion emission intensity among the fluorophosphate studied. The fluorophosphate glass with 23 mol% strontium fluoride has a broadband near-infrared emission at 1.5 mu m with a full width at half-maximum over 65nm and a long upper level fluorescence lifetime of 8.6ms.