光纤LP_(01)模远场发散角与归一化频率关系的研究  

Research on the Relationship Between Divergence Angles of Fiber LP_(01) Mode and Normalized Frequency

作　　者：胡林顺[1,2] 李连煌[2] 郭福源[2] 

机构地区：[1]五邑大学应用物理与材料学院,广东江门529020 [2]福建师范大学激光与光电子技术研究所,福建福州350007

出　　处：《五邑大学学报（自然科学版）》2010年第2期24-28,共5页Journal of Wuyi University(Natural Science Edition)

基　　金：福建省科技厅F5类项目(2007F5040);福建省自然科学基金资助项目(A0540001)

摘　　要：根据折射率阶跃对称分布的光纤LP01模端面衍射远场的振幅分布,分析了衍射光束的半值全角宽度及振幅下降到1/e处对应的远场发散角全角各自随光纤归一化频率变化的关系;采用等效匹配效率法分析了远场发散角角半径,拟合出远场发散角角半径随归一化频率变化的函数表达式,并通过误差分析证明了拟合函数表达式的精确性.Based on the far-field diffraction amplitude distribution of fiber LP01 mode,the relationships between full angle at half maximum and the far-field divergence full angle of the amplitude drop to 1/e point with fiber normalized frequency are analyzed.The equivalent matching efficiency method is employed for the calculation of far-field divergence angle,and the function expression of the angle along with the fiber normalized frequency is fitted,and its accuracy is proved through error analysis.

关 键 词：远场发散角 半值全角宽度 等效匹配效率法 相对误差 

分 类 号：TN25[电子电信—物理电子学] O436[机械工程—光学工程]