摘要
设计了一种正八边形空气孔排列的大模面积色散平坦光子晶体光纤，借助多极法对这种结构的光子晶体光纤的模场面积、有效折射率、色散系数和限制损耗进行了数值模拟。结果表明，正八边形空气孔排列的光子晶体光纤的模场面积较相同空气孔间距和空气填充率的正六边形空气孔光子晶体光纤大，且其色散曲线可以在很宽的波长范围内保持色散平坦并具有较低的色散值。主要分析了当这种光纤的结构参数发生改变时，光纤的限制损耗、有效模面积以及色散特性的变化规律，最终通过选择适当的参数，设计了在1300-1650nm波长范围内色散平坦的大模面积光子晶体光纤。
Design of octagonal photonic crystal fiber structure with eight air-holes on the first ring for application with flat chromatic dispersion and large mode area has been investigated. The mode area, effective refractive index, dispersion coefficient and confinement loss of the octagonal photonic crystal fiber have been numerically investigated by using multipole method. It is found that under the same p!tch and air filling fraction of the octagonal photonic crystal fiber has larger mode area than the hexagonal photonic crystal fiber and the octagonal photonic crystal fiber also can realize flat dispersion over a wide wavelength range. The influence of structure parameter of fiber cladding on the confinement loss, dispersion characteristic and mode area is analyzed. The results show that the proposed photonic crystal fiber can achieve large mode area and flat chromatic dispersion from 1 300 nm to 1 650 nm.
出处
《半导体光电》
EI
CAS
CSCD
北大核心
2006年第6期725-728,732,共5页
Semiconductor Optoelectronics
基金
国家高技术发展研究计划资助项目(2003AA311010)
国家重点基础研究发展计划资助项目(2003CB314905)
关键词
光纤光学
光子晶体光纤
色散平坦
大模面积
多极法
fiber optics
photonic crystal fiber
flat dispersion
large mode area
multipole method
