【摘要】 利用光线光学的原理分析了自聚焦透镜的光学性能，提出了求解自聚焦透镜离轴耦合损耗的数学模型，利用这一模型计算出了单模光纤与自聚焦透镜离轴耦合时的耦合损耗与模向距离的关系曲线，为自聚焦透镜离轴耦合的设计提供理论依据．更多还原

【Abstract】 The optical characteristics of GRIN lens are analyzed by applying principles of the rayoptics. A mathematical model used to compute losses of GRIN lens. off-axis coupling has been carriedout. We show the relative curve between losses and offset distance, and provide a theoretical referenceto design GRIN’s off-axis coupling.更多还原