Absorption efficiency of graded-index double-clad fiber lasers  

作　　者：王子华 张辉 肖中银 

机构地区：[1]School of Communication and Information Engineering, Shanghai University, Shanghai 200072, P. R. China

出　　处：《Journal of Shanghai University(English Edition)》2006年第1期44-47,共4页上海大学学报（英文版）

基　　金：ProjectsupportedbyNationalNaturalScienceFoundationofChina(GrantNo.60277025),PreliminaryDefenceResearchFoundation(GrantNo.51437080204QT0601),andShanghaiLead-ingAcademicDisciplineProject(GrantNo.T0102)

摘　　要：Absorption efficiency of graded-index double-clad fiber lasers or amplifiers is analyzed. As ray optics method is no longer valid for graded-index case, the mode analysis method is used. Calculated results show that absorption efficiency for a graded-index is higher than that for a step-index in symmetric case. In offset core case, the graded-index can achieve the same absorption efficiency with much smaller offset distance. Absorption efficiencies for different graded-index profiles of the inner cladding are compared.Absorption efficiency of graded-index double-clad fiber lasers or amplifiers is analyzed. As ray optics method is no longer valid for graded-index case, the mode analysis method is used. Calculated results show that absorption efficiency for a graded-index is higher than that for a step-index in symmetric case. In offset core case, the graded-index can achieve the same absorption efficiency with much smaller offset distance. Absorption efficiencies for different graded-index profiles of the inner cladding are compared.

关 键 词：pump absorption double-clad fibers graded-index multimode fibers. 

分 类 号：TN248.1[电子电信—物理电子学]