一种实现矩形光源与光纤高效耦合的方法  

An Effective Way of Reducing Coupling Loss between Rectangular Laser and Conventional Fiber

作　　者：孙桂林[1,2] 陈子伦[1] 奚小明[1] 侯静[1] 姜宗福[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073 [2]海军航空工程学院基础部,山东烟台264001

出　　处：《光学学报》2010年第12期3403-3407,共5页Acta Optica Sinica

基　　金：教育部新世纪优秀人才计划(NCEF-08-0142);国家自然科学基金(61007037)资助课题

摘　　要：提出利用变形光子晶体光纤实现矩形光源和普通单模光纤的高效耦合,变形光子晶体光纤矩形芯一端连接矩形光源,圆形芯一端连接普通光纤。首先利用光束传播法计算了此结构的耦合效率;然后通过堵孔、充气和加热的方法,实现了矩形芯到圆形芯的变形光子晶体光纤的制作。模拟结果显示,该耦合方式优于矩形光源与普通单模光纤的直接耦合,可将耦合效率提高3.9 dB以上。实验结果表明,利用这种耦合方式连接矩形光源与普通单模光纤是完全可行的。An anamorphic photonic crystal fiber（PCF） is introduced to improve the coupling loss between rectangular laser and conventional single-mode fiber.One end with rectangular core is connected with laser,the other end with round core connect with conventional fiber.Firstly,the coupling efficiency is calculated by beam propagation method.Then after blocking four holes of the PCF,and inflating,heating,an anamorphic core-shape PCF is formed with four holes absolutely collapsed.The simulation results show that,comparing to the straight coupling between rectangular laser and conventional single-mode fiber,more than 3.9 dB improvement of coupling efficiency is achieved by this new method.And the experimental results show that the new structure is feasible.

关 键 词：光纤光学 光子晶体光纤 空气孔塌缩 耦合效率 矩形光源 普通单模光纤 

分 类 号：TN252[电子电信—物理电子学]