方形和三角形格点分布渐变空气孔微结构光纤的色散特性比较  

Comparision of Dispersion Properties between Square-lattice and Triangle-lattice Microstructured Optical Fiber with Varying Hole Diameter

作　　者：武劲青[1] 薛文瑞[1] 周国生[1] 

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《量子光学学报》2005年第4期164-170,共7页Journal of Quantum Optics

基　　金：山西省自然科学基金(No.20041036)

摘　　要：运用时域有限差分法计算了方形和三角形格点分布的渐变微结构光纤的色散曲线,并对它们的色散特性进行了比较。结果表明这两种渐变微结构光纤的色散对最内层空气孔的直径的依赖性都比较高;在孔间距为2.0μm^3.0μm范围内,不同参数条件下,方形格点分布的渐变微结构光纤的色散曲线比较相似,空气孔间距、最内层空气孔的直径和直径递增量对它影响较小,且能在比较宽的波长范围(1.2μm^1.8μm)内保持平坦;而三角形格点分布的渐变微结构光纤对空气孔间距、最内层空气孔的直径和直径递增量都比较敏感,不同参数条件下它的色散曲线变化较大。Using FDTD method, the dispersion curves of the square-lattice and triangle-lattice microstructured fibers （MOF） with varying hole diameter have been caculated, and the dispersion properties of the both kinds optical of MOF have been compared. Obtained results show that： the disprsion of this two kinds of MOF depends strongly on the diameter of the center air ring. When the hole to hole spacing is in the rang of 2.0 μm- 3.0μm, the dispersion curves of the square-lattice MOF are more similar at different cases. The hole to hole spacing A, the air hole diameter d1 of the first ring and the linear increasing quantity of the diameter ,Ad have little effect on it. The dispersion curves of this kind of MOF can remain flat in a wide wavelength range of 1.2 μm- 1.8μm. But the triangle-lattice MOF have strong sensitivity to the three parameters, and its dispersion curves change significantly at different cases.

关 键 词：色散 时域有限差分法(FDTD) 微结构光纤 

分 类 号：O431[机械工程—光学工程]