国产掺镱双包层光纤的激光特性  

Properties of ytterbium-doped double clad fiber made in China

作　　者：薛冬[1] 楼祺洪[1] 周军[1] 孔令峰[1] 魏运荣[1] 董景星[1] 李进延[2] 李诗愈[2] 

机构地区：[1]中国科学院上海光学精密机械研究所 [2]烽火通信科技股份有限公司,湖北武汉430073

出　　处：《强激光与粒子束》2005年第5期665-668,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(60244005);中国科学院知识创新工程和上海市光科技专项资助课题(036105034)

摘　　要：采用MCVD方法研发了掺镱双包层光纤,并对其结构特性、荧光特性和激光特性进行了测试和研究。其D形内包层尺寸为400/450μm,数值孔径为0.36,纤芯直径约为16μm,数值孔径约为0.18。荧光谱线的范围为1000～1140nm,1030nm处的峰宽大于50nm。采用大功率激光二极管单端泵浦6m长的双包层光纤,在泵浦入纤功率为61W时,获得了32W的激光输出,斜率效率为64%。该光纤在高功率处未发现饱和现象,通过优化光纤参数与泵浦方式还可以提高转化效率和输出功率。实验表明该光纤可以取代进口光纤用作高功率激光器件。The double clad fiber made in China was fabricated by the modified chemical-vapor deposition (MCVD) technique. The geometric, fluorescence, and laser characters of the fiber were measured. The fiber has a 16 μm diameter Yb-doped core with a numerical aperture (NA) of 0.18, and the inner cladding has a 400/450 μm diameter for the longer/shorter axis with a NA of 0.36. The fluorescence spectrum ranged from 1000-1140 nm, and the spectrum width at 1030 nm is greater than 50 nm. When one end of the fiber was pumped by a high-power laser diode with the launched power of 61 W, 32 W laser output was obtained with the slope efficiency of 64%. There is no evidence of saturation at high pump powers, so the output power can be further improved by optimizing the parameters.

关 键 词：掺镱双包层光纤 斜率效率 光纤激光器 荧光特性 

分 类 号：TN248[电子电信—物理电子学]