光纤型光可变衰减器的探索  

Exploring One Kind of Fiber-optic VOAs

作　　者：薛春荣[1] 汪洁[2] 吴文娟[2] 

机构地区：[1]常熟理工学院,江苏常熟215500 [2]杭州电子科技大学,浙江杭州310018

出　　处：《激光与红外》2005年第4期265-268,共4页Laser & Infrared

基　　金：自然科学基金资助(No. 69877014)。

摘　　要：通过熔融拉锥工艺制备熔锥光纤,将两熔锥光纤以一定的方式装配在二维精密微调架上,制备光纤型光可变衰减器。利用光信号在光纤锥形区特有的传输和耦合特性,实现了光纤间的耦合,耦合效率决定了光能量的衰减程度,从而决定了光纤型光可变衰减器的性能。用耦合模理论分析了锥形光纤间的传输和耦合性质,并从实验上给出了两锥形光纤间的耦合与两锥形光纤间的距离的关系,为制备光纤型光可变衰减器提供了理论和实验依据。Two tapered optical fibers,fabricated by nelt-pulling method,are assembled in some mode on two-dimension precisely micrometer adjusting setting,which constitutes a new kind of fiber-optic variable optic attenuators(VOAs).Properties of transmitting are special when light transmits in tapered fibers,which benefits light coupling between two tapered fiber.The coupling efficiency determines the power attenuation,which is important for a fiber-optic VOA.Optical fiber transmission and fiber coupling between two tapered fibers are analyzed theoretically.Also,the coupling efficiencies of two tapered fibers versus the vertical distance and the overlap length of two tapered regions of them are analyzed by experiment.All of those are important for manufacturing or studying fiber-optic VOA.

关 键 词：可变光衰减器 锥形光纤 传输和耦合 

分 类 号：TN253[电子电信—物理电子学]