高双折射双芯光子晶体光纤特性

Characteristics of Highly Birefringent Dual-Core Photonic Crystal Fibers

提出一种新型的高双折射双芯光子晶体光纤(PCF)模型,通过将最内层8个空气孔替换为4个椭圆空气孔来增大光纤的结构不对称性;通过改变两纤芯间的空气孔大小、椭圆空气孔的椭圆度以及孔间距来分析光子晶体光纤的双折射度、耦合长度以及色散特性。结果表明,双芯光子晶体光纤的模式双折射度达到10-2量级,耦合长度达0.1367mm,在1.0～1.6μm波长范围内具有超平坦色散特性。

A kind of dual-core highly birefringent photonic crystal fibers（PCF） is proposed.The model introduces the asymmetrical structure through replacing the innermost eight air holes with four elliptic air holes.The mode birefringence,coupling length and dispersion characteristics are studied by changing the hole size between the two cores,ellipticity of elliptic air holes and hole pitch.The results show that the mode birefringence is up to 10-2,the coupling length is as short as 0.1367 mm,and the dispersion is very flat from 1.0 μm to 1.6 μm.