双锥光纤中声光效应的理论分析  

The theoretical analysis of the acoustooptic effect in biconical fiber

作　　者：刘国祥[1] 胡力[2] 叶昆珍[2] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,安徽合肥230027 [2]电子科技大学通信与信息工程学院,四川成都610054

出　　处：《光学技术》2005年第6期819-821,共3页Optical Technique

摘　　要：利用耦合模理论分析了在双锥光纤耦合区中声光的相互作用,讨论了在不同耦合区半径下扰动周期与声波频率的关系。计算了在双锥光纤中声光谐振耦合的波谱特性和模式转换效率、带宽与调制周期和耦合区长度的关系。介绍了声光的可调谐性。基于此效应可制作全光纤可变衰减器和可调滤波器。The acoustooptic interaction in biconical optical fiber was analyzed based on coupled mode theory, and the relationship between perturbation period and flexural wave frequency was discussed. The transmission spectrum, mode-conversion efficiency, the relationship between bandwidth and its parameters such as modulation period, the length of taper waist, and acoustooptic tenability were computed. All-fiber acoustooptic variable attenuator and tunable filter can be fabricated based on this effect.

关 键 词：双锥光纤 声光效应 可变衰减器 可调滤波器 耦合模 

分 类 号：TN253[电子电信—物理电子学] TN65