Finite-difference imaginary-distance beam propagation method for modeling of the fundamental mode of photonic crystal fibers
Finite-difference imaginary-distance beam propagation method for modeling of the fundamental mode of photonic crystal fibers
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DOI：
10.1016/j.optcom.2003.07.021
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发表时间：
2003-09
影响因子：
2.4
通讯作者：
Yongzhi He;F. Shi
中科院分区：
文献类型：
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作者：
Yongzhi He;F. Shi
采用有限差分离散距离光束传播法研究了空气填充石英折射率导光子晶体光纤中基模的有效折射率。以一个具有中心缺陷的六边形空气孔光子晶体光纤为例进行了分析。研究了模态指数随空气孔半径的变化规律。结果表明，收敛速度与空气孔半径成正比。在HE状态下的模式双折射的数值研究和证明强烈依赖于数值网格的精度。
The finite-difference imaginary-distance beam propagation method is successfully employed to investigate the effective index of the fundamental mode in the air-filled silica index-guiding photonic crystal fibers (PCFs). A PCF characterized by a hexagonal distribution of air holes with a central defect is taken as example. The convergence behavior of the modal index versus the air hole radius is investigated. It is demonstrated that the converging speed is proportional to the air hole radius. The modal birefringence in the HE state is numerically investigated and demonstrated to strongly depend on the precision of the numerical mesh.