摘要
应用全矢量有限元方法,分析了椭圆形高折射率芯Bragg光纤的偏振和色散特性,详细讨论了光纤结构参量对模式双折射的影响,结果发现:椭圆形高折射率芯Bragg光纤的模式双折射在10-3量级,比传统保偏光纤高出一个量级,且随波长的增加而单调递增;模式双折射随包层低折射率材料填充比的增加而减小,但与包层周期的变化几乎无关.此外,提高椭圆率或材料间的折射率比可显著增强模式双折射.研究结果有助于设计高性能的一维微结构保偏光纤.
In this paper,it is investigated the polarization and the dispersive properties of the elliptical high- index-core Bragg fibers via a powerful full-vector finite element method. The simulation results show that the modal birefringence of the elliptical high-index-core Bragg fibers is on the magnitude of 10-3 , about one order magnitude larger than that of conventional polarization maintaining fibers. The dependence of the modal birefringence on the fiber structural parameters has been fully investigated. The modal birefringence decreases with the filling ratio of the low-refractive-index material and changes little with the variation of the period of the cladding layers. Larger ellipticity or higher index-contrast will result in enhanced modal birefringence. These results will be helpful to the design of high performance one-dimensional microstructured polarization maintaining fibers.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2006年第10期1529-1533,共5页
Acta Photonica Sinica
基金
国家973计划:新一代通信光电子集成器件及光纤的重要结构工艺创新与基础研究(编号:2003CB314906)资助
关键词
导波与光纤光学
BRAGG光纤
有限元
偏振
色散
Guided wave and fiber optics
Bragg fibers
Finite element
Polarization
Dispersion
