【摘要】 为了探讨靠近纤芯区域的第1层、第2层和第3层空气孔的直径对光子晶体光纤色散特性的影响,采用有限元法进行了理论分析。结果表明,适当调节第1层、第2层和第3层空气孔的直径,可以使零色散点在1100nm～1800nm之间的任何位置上移动。还可以设计在1270nm～1800nm较宽的波长范围内接近零色散的色散平坦光子晶体光纤。这一结果对光子晶体光纤的设计具有重要的作用。更多还原

【Abstract】 The dispersion properties of photonic crystal fibers were studied with finite element method (FEM)by changing the diameter of the air-holes belonging to the first three rings.It was found that zero dispersion wavelength could be shifted in the range of 1100nm ～ 1800nm by adjusting the air-hole diameter of the first, the second or the third ring.Photonic crystal fibers with nearly zero flattened dispersion over a very broad spectral range can be designed through choosing the suitable air-hole diameter of the first,the second or the third ring.The results is useful for photonic crystal fibers design.更多还原