超平坦色散和低损耗的高非线性光子晶体光纤  

Highly Nonlinear Photonic Crystal Fibers with Ultra-flattened Chromatic Dispersion and Low Confinement Loss

作　　者：张少华[1] 姚建铨[1] 陆颖[1] 徐德刚[1] 李敬辉[2] 

机构地区：[1]天津大学精仪学院,光电信息技术科学教育部重点实验室,天津300072 [2]天津大学仁爱学院计算机科学与技术系,天津301636

出　　处：《激光与光电子学进展》2011年第12期47-51,共5页Laser & Optoelectronics Progress

基　　金：国家973计划(2010CB327801)资助课题

摘　　要：设计了一种新型的光子晶体光纤(PCF),使其能同时实现高非线性,超平坦色散和低损耗。通过基于全矢量有限元算法的模拟软件COMSOL,分析加了各向异性完美匹配层的八层空气孔光子晶体光纤的有效模场面积,色散特性以及光纤的限制损耗。数值模拟结果指出在波长1.55μm处可获得36.2W-1.km-1的高非线性系数。在1.37～1.70μm共330nm波长范围内,光子晶体光纤的色散值可达到(0.3±0.3)ps/(nm.km),同时限制损耗在1.37～1.62μm波长范围始终低于0.1dB/km。A novel design of Photonic Crystal Fiber （PCF） was present in order to simultaneously achieve high nonlinearity, ultra-flattened dispersion, and low confinement loss. The software COMSOL based on finite element method with anisotropic perfectly matched layers is used to analyze the effective mode area, dispersion properties, and confinement loss of PCF with eight-ring air holes. Numerical results show that a small effective mode area corresponding to a high nonlinear coefficient of the order 36.2 W^-1·km^-1 at 1.55 tam wavelength is obtained. Moreover, ultra-flattened dispersion of （0.3 ± 0.3）ps/（nm · km） is also obtained over 330 nm bandwidth from 1.37 tam to 1.70 μm with low confinement losses less than 0.1 dB/km within the band of 1.37μm to 1.62 μm.

关 键 词：非线性光学 光子晶体光纤 高非线性 超平坦色散 低损耗 

分 类 号：TN253[电子电信—物理电子学]