掺镱双包层光纤激光器内腔倍频绿光实验研究(英文)  

Experimental Study on Intra-Cavity Frequency-Doubling at 532 nm in an Yb-Doped Fiber Laser

作　　者：安宏波[1] 牛丽红[1] 苏秉华[2,3] 薛竣文[3] 谭羽[2] 

机构地区：[1]深圳大学光电工程学院,广东深圳518060 [2]北京理工大学光电学院,北京100081 [3]北京理工大学珠海学院信息学院,广东珠海519085

出　　处：《激光与光电子学进展》2012年第7期119-122,共4页Laser & Optoelectronics Progress

基　　金：北京理工大学珠海学院青年教师科研发展基金(ky-2010-0016)资助课题

摘　　要：提出了一种内腔形式的双包层光纤激光器倍频绿光的结构,利用腔内极高的抽运光功率密度,理论上能获得高转换效率的倍频绿光输出,结合双包层光纤激光器结构紧凑的优点,容易实现激光器一体化。根据高斯光束透镜变换定律计算了透镜与系统的相对位置,当高斯光束聚焦参数等于倍频晶体长度两倍且束腰处于晶体输出端面时,系统处于最佳聚焦。实验输出10.5mW绿光,系统倍频效率为0.35%。验证了激光在腔内形成振荡,表明该结构能实现高效的连续绿光输出。A structure of intra-cavity frequency doubling in a continuous-wave（CW） Yb-doped double-clad fiber laser is proposed.High conversion efficiency green laser can be obtained in theory due to the high pump power density in the cavity.Advances in compact structure of double-clad fiber laser also allow for the availability of laser integration.In this work,the optimized efficiency is achieved when the waist is located at the edge of MgO∶PPLN and the Rayleigh length is equal to twice the length of the crystal,and the lens′ location in the system was calculated.10.5 mW green laser is obtained,and the second harmonic generation（SHG） efficiency of the system is 0.35%.Laser oscillation in the cavity is verified and it is indicated that the structure can achieve effective CW green output.

关 键 词：光纤激光器 倍频 内腔 532NM激光 

分 类 号：TN248.1[电子电信—物理电子学]