含Ho^(3+)的GeO_2-B_2O_3-BaO-Na_2O-Al_2O_3锗酸盐玻璃的光谱与增益特性  

The optical and gain properties of GeO_2-B_2O3-BaO-Na_2O-Al_2O_3 gemanate glasses containing Ho^(3+) ion

作　　者：喻军[1] 夏海平[1] 章践立[1] 

机构地区：[1]宁波大学光电子功能材料重点实验室,浙江宁波315211

出　　处：《光学技术》2009年第3期380-383,共4页Optical Technique

基　　金：国家自然科学基金资助项目(60777030);浙江省自然科学基金资助项目(Y406220);宁波市重点实验室开放基金资助项目(2007A22010);宁波大学王宽诚幸福基金资助项目

摘　　要：用高温熔融法制备了不同Ho3+离子掺杂浓度65GeO2-12B2O-10BaO-10Na2O-3Al2O3-χHo2O3(χ=0.25,0.75,1.25mol%)锗酸盐玻璃。从吸收特性出发,应用McCumber理论计算了Ho3+离子能级5I8→5I7(~2.0μm)跃迁的吸收截面和5I7→5I8的受激发射截面。根据掺杂离子的浓度以及获得的吸收截面和受激发射截面得到Ho3+离子在此玻璃中的增益截面函数,从该函数可反映出材料的粒子数反转特性。获得的基本光学参数与其它掺杂的玻璃进行了比较,其吸收截面、发射截面和增益截面的最大值具有一定的优势。认为该玻璃在~2.0μm波段的中红外激光器中将有潜在的较大应用前景。Glasses with the compositions of 65GeO2-12B2O3-10BaO-10Na2O-3Al2O3 doped with different Ho^3＋ concentration （Z = 0.25,0.75, 1.25mol% ） are fabricated by conventional melting method. The absorption and stimulated emission cross-section corresponding to the ^5I8→5 I7 （ - 2.0μm） and ^5I7→^5I8 transitions of Ho^3＋ are obtained from their absorption spectra, and respective gain cross section spectra are also computed as a function of population inversion according to absorption and emission cross-sections and the ion concentrations. These Ho^3＋ -doped germanate glasses have an advantage in the maximum of the absorption, emission and gain cross-sections compared with those of other reported glasses. Hence, the obtained glasses have potential applications in mid-infrared lasers at about -2.0μm wavelength.

关 键 词：吸收截面 发射截面 增益截面 Ho^3+掺杂锗酸盐玻璃 

分 类 号：TB381[一般工业技术—材料科学与工程]