摘要
针对挠性光互联中光纤存在弯曲损耗的问题,文中简要介绍了弯曲损耗产生的原理,采用全矢量有限元法对比研究了SMF-28单模光纤和G657B光纤的弯曲损耗。研究结果表明,弯曲损耗随入射波长的增加而增加,随弯曲半径的增加而减小。2种光纤的弯曲损耗相差较大,主要原因在于G657B在光纤结构上的差异,其包层上掺杂了下陷层,增大了芯层和包层之间的折射率的差,增强了光纤芯层的束光能力,降低了光纤的弯曲损耗。文中的研究对光纤在挠性光互联中的应用具有一定的指导意义。
In order to solve the fiber bending loss problem in flexible optical interconnection, the principle of bending loss of optical fiber is introduced briefly. The bending losses of SMF-28 single-mode fiber and G657B fiber are compared using full-vector FEM （finite element method）. The results show that the bending loss in- creases as the operating wavelength increases, and decreases as the bending radius increases. The big differ- ence of bending loss between the two optical fibers is due to the different structure of G657B fiber. The trench doped in cladding layer increases the refractivity difference between the fiber core and the cladding layer and enhances the beam ability of the fiber core, therefore reduces the bending loss. The research has certain guid- ing significance for the application of fiber in flexible optical interconnection.
作者
佘雨来
周德俭
陈小勇
SHE Yu-lai;ZHOU De-jian;CHEN Xiao-yong(Guilin University of Electronic Technology,Guilin 541004,China)
出处
《电子机械工程》
2018年第4期60-64,共5页
Electro-Mechanical Engineering
关键词
光互联
弯曲损耗
有限元法
flexible optical interconnection
bending loss
FEM
