液芯高双折射率光子晶体光纤的特性研究  

Investigation of a Liquid-core Photonic Crystal Fiber with High Birefringence

作　　者：姜凌红[1] 郑义[1] 郑凯[1] 彭继迎[1] 

机构地区：[1]北京交通大学理学院激光所,北京100044

出　　处：《光子学报》2014年第9期21-26,共6页Acta Photonica Sinica

基　　金：国家重点基础研究发展计划(No.2010CB327604)资助

摘　　要：设计了一种纤芯区域由中心椭圆缺陷孔和其横排的上下两侧椭圆孔组成的高双折射率光子晶体光纤，并在其纤芯中心椭圆缺陷孔中填充高折射率液体物质二硫化碳．利用有限元法分析了该光子晶体光纤的双折射率、功率限制因子、模场分布及色散系数特性．研究结果表明：液芯光纤具有较高的纤芯功率限制因子，在波长0．6～1．6μm范围内实现了宽带大负色散系数，在波长1．55μm处光纤双折射率达到了6．8×10^2，即该结构液芯光子晶体光纤同时实现了宽带大负色散和高双折射率特性．通过结构参量容差性分析得到该光纤具有较好的偏振稳定性．A kind of highly birefringent Photont Crystal Fiber （PCF） was proposed , a central defect elliptical hole and two other elliptical holes just below and above the central one were introduced in the core region of PCF. The central defect elliptical air hole was filled with high refractive index of liquid such as carbon disulfide. The birefringence, power confinement factor, fundament mode field and dispersion characteristic of the fiber were studied by the full-vector finite element method. The results show that the liquid-core PCF has high power confinement factor, the high negative dispersion is realized in a wavelength range from 0.6 to 1.8 μm, and the birefringence up to 6.8× 10^-2 at 1.55 μm. The proposed PCF has achieved both the high birefrigence and broadband high negative dispersion characteristics, and showes good polarization stability bv analyzing stucutural parameter fluctuation.

关 键 词：高双折射率 功率限制因子 色散系数 有限元 光子晶体光纤 

分 类 号：O437[机械工程—光学工程]