一种低串扰近零超平坦色散七芯光子晶体光纤的设计

Design of a seven-core photonic crystal fibers with low crosstalk and nearly zero ultra-flattened dispersion

设计了一种七芯低串扰近零超平坦色散液体填充光子晶体光纤,利用有限元法模拟计算了色散、芯间串扰和弯曲损耗等性能.数值模拟结果表明,该多芯光纤在实现近零宽带超平坦色散的同时,显著抑制了芯间串扰和弯曲损耗.在波长为1.38~1.74μm时,色散值介于0±0.5 ps/(km·nm)之间,且色散斜率介于0±0.02 ps/(km·nm^(2))之间.芯间串扰在C+L波段的最大值低于-84.09 dB/100 km,并且弯曲损耗值满足ITU-T建议的G.654光纤在125μm包层直径中对七芯光子晶体光纤的要求.

In this paper,a liquid-filled seven-core photonic crystal fiber with low crosstalk and nearly zero ultra-flattened dispersion is designed,and its dispersion,inter-core crosstalk,and bending loss are numerically simulated by the finite element method.Numerical simulation results show that the fiber not only achieves nearly zero ultra-flattened dispersion but also significantly suppresses inter-core crosstalk and bending loss.At wavelengths of 1.38μm to 1.74μm,the absolute value of dispersion is less than 0.5 ps/(km·nm),while the absolute value of dispersion slope is less than 0.02 ps/(km·nm^(2)).The maximum value of inter-core crosstalk is lower than-84.09 dB/100 km in the C+L band and the bending loss is lower than the ITU-T recommendations of G.654 in a seven-core PCFs with a 125μm cladding diameter.