We propose new design parameters for index-guiding holey fiber that can provide flexibility in defect and lattice design and adiabatic mode transformation capability. The new defect consists of a central air hole and a germanosilicate ring surrounding it, which results in a large-area annulus mode profile, low splice losses to standard fiber, 0.7 dB at 1.55 (mu)m, and chromatic dispersion with a low slope, 0.002 ps/km nm~(2).
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机译：我们为折射率有孔的光纤提出了新的设计参数，该参数可以提供缺陷和晶格设计的灵活性以及绝热模式转换的能力。新的缺陷包括一个中央气孔和一个围绕它的锗硅酸盐环，这导致大面积的环形模态分布，对标准光纤的熔接损耗低，1.55μm处的0.7 dB，色散低且斜率低，0.002 ps / km nm〜（2）。
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