圆形双芯微结构色散补偿光纤的色散特性分析  

Analysis of Dispersion Properties Indispersion-compensating Fiber Based on A Circle Dual-concentric-core Microstructured Optical Fiber

作　　者：王丹[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》2006年第2期102-108,共7页Journal of Quantum Optics

基　　金：山西省自然科学基金(No.20041036)

摘　　要：提出了一种圆形双芯微结构光纤,用频域有限差分法(FDFD),并对其色散特性进行了分析,并与前人提出的六边形双芯微结构色散补偿光纤进行了比较。结果表明:当圆形双芯微结构色散补偿光纤的高折射率区半径保持不变时,改变沿水平直径方向相邻空气洞中心点间的距离和空气洞的直径,能够控制有效模折射率的转折点,并在该处产生较大的负色散。由于圆形双芯微结构色散补偿光纤比六边形双芯微结构色散补偿光纤的有效模折射率对参数变化较为敏感,故前者更易于精确地控制转折点,达到色散补偿的目的。The dispersion properties in dispersion-compensating fiber based on a circle dual-concentric-core microstructured optical fiber are analysed by the FDFD method and compared with another dispersion-compensating fiber based on a hexagonal dual-concentric-core microstructured optical fiber. The results show that the transition point of the effective mode index can be controlled to the required region by changing the distance between center point of adjacent air holes along horizontal diameter direction and diameter of air holes while radius of the high index core keeping invariable in the dual core circular microstructured optical fiber. Moreover, a very large negative dispersion value at this point can be obtained. The dispersion can be controlled more accurately and easily in it for dispersion management, because the effective mode index of the dual core circular microstructured optical fiber are more sensitive to parameters than the dual core hexagonal microstructured fiber.

关 键 词：双芯做结构光纤 色散补偿 频域有限差分法 

分 类 号：O431[机械工程—光学工程]