We numerically demonstrate ultraflattened chromatic dispersion with low losses in microstructured optical fibers (MOFs). We propose using two different MOF structures to get this result. Both structures are based on a subset of a triangular array of cylindrical air holes; the cross sections of these inclusions are circular, and a missing hole in the fiber's middle forms the core. In this MOF structure the diameters of the inclusions increase with distance from the fiber axis until the diameters reach a maximum. With this new design and with three different hole diameters, it requires only seven rings to reach the 0.2-dB/km level at lambda = 1.55 mum with a variation amplitude of dispersion below 3.0 x 10(-2) ps nm(-1) km(-1) of lambda = 1.5-1.6 mum. With the usual MOF (made from holes of identical diameter), we show that at least 18 hole rings are required for losses to decrease to < 1 dB/km at lambda = 1.55 mum. 2003 Optical Society of America. [References: 11]
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机译：我们在数值上证明了在微结构光纤（MOF）中具有低损耗的超平坦色散。我们建议使用两种不同的MOF结构来获得此结果。两种结构都基于圆柱形气孔的三角形阵列的子集。这些夹杂物的横截面是圆形的，并且纤维中间的缺失孔形成了芯。在这种MOF结构中，夹杂物的直径随着与纤维轴的距离的增加而增大，直到直径达到最大值。采用这种新设计并具有三种不同的孔径，只需七个环就可以在λ= 1.55 mum时达到0.2 dB / km的水平，并且色散的变化幅度低于3.0 x 10（-2）ps nm（-1） λ的km（-1）= 1.5-1.6毫米使用通常的MOF（由相同直径的孔制成），我们表明至少需要18个孔环才能在λ= 1.55 mum时将损耗降低至<1 dB / km。 2003年美国眼镜学会。 [参考：11]
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