全固高非线性低色散斜率光子晶体光纤设计  

Highly Nonlinear All-Solid Photonic Crystal Fibers with Low Dispersion Slope

作　　者：徐惠真[1] 周昌杰[1] 

机构地区：[1]集美大学理学院,福建厦门361021

出　　处：《中国激光》2012年第11期69-74,共6页Chinese Journal of Lasers

基　　金：福建省自然科学基金(2011J05006;2012J05121);集美大学科研预研基金(C611012)资助课题

摘　　要：提出了利用掺氟同心圆环的光纤结构来提高光子晶体光纤(PCF)的非线性,所需控制的参量仅有两个。设计了三种具有高非线性、低色散斜率和低限制损耗的全固光子晶体光纤。这三种光纤分别具有正常色散、双零色散点和零色散点恰好在1.55μm波长处的色散曲线特性。所设计的零色散点恰好在1.55μm波长处的光子晶体光纤色散斜率值为5.12×10-4 ps/(km·nm2),这比传统的高非线性光纤的色散斜率小了2个数量级。同时,该光纤在1.55μm波长处的非线性系数为31.5W-1·km-1,限制损耗为9.62×10-5 dB/km。Fluorine-doped （F-doped） trench-assisted structure is proposed to improve the nonlinearity of photonic crystal fibers （PCFs）, Through controlling only two parameters, three all-solid highly nonlinear PCFs with low dispersion slope and low confinement loss are designed. They exhibit all normal dispersion, two zero dispersion wavelengths （ZDWs） and one ZDW just at 1.55 μm, respectively. The dispersion slope of one ZDW just at 1.55 μm is 5.12×10-4 ps/（km·nm2 ）, which is two order of magnitude lower than that of conventional highly nonlinear fibers. A nonlinear coefficient of 31.5 W-1·km-1 and loss low of 9.62×10-5 dB/km at 1.55 μm are achieved for this PCF.

关 键 词：光纤光学 高非线性 低色散斜率 光子晶体光纤 

分 类 号：TN929.11[电子电信—通信与信息系统]