中文摘要：

设计了一种新型六角点阵光子晶体光纤,该光纤在波长1 350～1 800nm范围内呈现高双折射低损耗大负色散。采用全矢量有限元法结合各向异性完美匹配层边界条件,对其双折射、约束损耗、色散、非线性和模场等特性进行了数值模拟。研究表明,新设计的光纤对模场有很强的约束能力,在波长1 550nm处双折射高达2.08×10-2,模约束损耗接近10-1 dB·km-1,负色散值高达-910ps·km-1·nm-1,模场面积高达2.67μm2,非线性系数仅有0.043m-1·W-1。该光纤将在光纤激光器、光纤放大器、光滤波器和光纤传感系统方面有重要的应用。

英文摘要：

： A novel hexangular lattice photonic crystal fiber was proposed, which shows high birefringence, low loss and negative dispersion in the wavelength range of 1 350-1 800 nm. Full vector finite element method was combined with anisotropic perfectly matched layers to make numerical investigations on its birefringence, leakage loss, dispersion, nonlinear and mode field. Numerical results show that the proposed fiber owns a leakage loss of close to 10-1 dB· km-1 , a birefringence value of 2.08 ×10-2 , the nonlinear coefficient of only 0. 043 m-1· W-1 , negative !＇dispersion value of --910 ps · km-1·nm-1 , and the corresponding area of mode field of 2.67μm2 at the wavelength of 1 550 nm. Obviously, the proposed PCF presents great application potential in the fields of optical amplifier, fiber laser, optical filter and fiber sensor system.