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中文摘要：
提出了一种新的溶液掺杂与非化学气相沉积（non-chemical vapor deposition,NCVD）熔融相结合的方法制备稀土掺杂石英基玻璃,并采用该方法制备出组分为98SiO2-0.5Yb2O3-1.5Al2O3wt、折射率nD=1.519和密度ρ=2.62g/cm3的镱铝共掺石英玻璃.经实验测试表明它的吸收区在850—1050nm波长,主峰位于978nm,吸收次峰位于919nm;利用波长为978nm的激光对该玻璃样品进行激发,所产生荧光中心波长为1018nm,荧光线宽71.8nm.本文还通过理论计算了掺镱石英玻璃的积分吸收截面,受激发射截面,荧光线宽,荧光寿命,饱和抽运强度,最小抽运强度等参数.测试结果表明此种掺杂石英玻璃具有良好的热稳定性和大的功率阈值,是超大功率掺杂光子晶体激光器理想的增益介质.
英文摘要：
We demonstrate a new method for fabrication of rare-doped silica-based glass,which is liquid doped with non chemical vapor deposition（non-CVD） melting process.The Ytterbium doped silica-based glass with the ratio of 98SiO2-0.5Yb2O3-1.5Al2O3wt is achieved by using this method.The refractive index（nD） and the density（ρ） of the glass are 1.519 and 2.62g /cm3 respectively.In measurement experiment,it shows that it has strong absorption in the wavelength range from 850nm to 1050nm,and the main absorption peak is at 978nm and the secondary absorption peak is at 919nm.Using the laser with wavelength of 978nm as pumping source,the emission peak is at 1018nm in the fluorescence spectrum with a 71.8nm fluorescence half-line width.Meanwhile,the integrated absorption cross section,stimulated emission cross section,fluorescence time,saturated pump intensity,minimum pump intensity and other parameters are calculated.Test results indicate that the doped silica-based glass has good thermal stability and large power threshold,which is an ideal gain medium for large power photonic crystal fiber lasers.
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