掺Yb^(3+)双包层光子晶体光纤激光器的实验研究  

Experimental Research on Yb^(3+)-doped Double-clad Photonic Crystal Fiber Lasers

作　　者：闫培光[1] 李乙钢[1] 张炜[1] 冯鸣[1] 陈胜平[1] 李家方[1] 朱剑平[1] 吕可诚[1] 董孝义[2] 

机构地区：[1]南开大学物理学院光电信息科学系,天津300071 [2]南开大学现代光学所,天津300071

出　　处：《光电子．激光》2004年第4期413-415,共3页Journal of Optoelectronics·Laser

基　　金：国家高技术研究发展计划资助项目(2003AA312100);国家自然科学基金重点资助项目(60377010);高等学校博士点专项科研基金资助项目(20030055016)

摘　　要：实验采用中心波长975nm的最大输出功率5W的LD作泵源,掺Yb3+双包层光子晶体作增益介质,二色镜和光纤端面构成F P腔。光纤长6m;纤芯直径为3.9μm,对泵光的吸收系数为2300dB/m;内包层直径为200μm,大数值孔径设计(对泵光,数值孔径为0.7)。实验结果表明,在入纤泵浦功率1.73W时获得波长1.078μm、功率1.45W的单模激光,斜率效率为85.1%;模式竞争和自脉动效应是影响激光器输出稳定性能的主要因素。An Yb3+-doped double-clad photonic crystal fiber laser was reported. A 5 W maximum output power multimode laser diode with 975 nm central wavelength was used as the pump source, a 6 m long Yb3+-doped double-clad photonic crystal fiber was used as gain medium and the F-P cavity is formed by a dichroic mirror and the output face of the fiber. The fiber has a single-mode core with a diameter of 3.9 μm, which has pump absorption of 2300dB/m. The inner cladding has a diameter of 200 μm and is designed with high numerical aperture (0.7 at the pump wavelength). The laser operates under single-mode state at 1.078 μm, the maximum output power is 1.45 W and the slope efficiency is 85.1% with respect to the launched pump power of 1.73 W. The mode competition and self-pulsing effect were regarded as the main factors that affect the output stability performance of the laser.

关 键 词：掺YB^3+ 双包层光子晶体光纤 光纤激光器 数值孔径 PCF 光纤结构 

分 类 号：TN248[电子电信—物理电子学]