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    • 10. 发明申请
    • OPTICAL FIBRES WITH SPECIAL BENDING AND DISPERSION PROPERTIES
    • 具有特殊弯曲和分散性能的光纤
    • WO02039159A1
    • 2002-05-16
    • PCT/DK2001/000746
    • 2001-11-12
    • C03B37/012G02B6/02G02B6/024G02B6/10G02B6/16
    • G02B6/024C03B37/01205C03B2203/02C03B2203/10C03B2203/14C03B2203/32C03B2203/42G02B6/02338G02B6/02357G02B6/02361G02B6/02371G02B6/0239
    • A microstructured optical fibre having a specially designed cladding to provide single mode waveguidance and low sensitivity to bending losses. In one aspect the optical fibre has an inner and an outer cladding each comprising elongated features. The inner cladding features have normalized dimensions in the range from 0.35 to 0.50 and the outer cladding features have normalized dimensions in the range from 0.5 to 0.9, where the normalization factor is a typical feature spacing. THe fibre is further characterized by a feature spacing of the inner cladding larger than 2.0 micron. In a second aspect, the fibre has a special non-circular and non-equilateral-polygonial outer cross-sectional shape to mechanically ensure bending in predetermined directions that are favourable with respect to low bending losses. The present invention provides fibres, which are less sensitive to macrobending losses than presently known single-mode fibres with similar sized mode areas, and provides robust, single-mode, large-mode area fibres for long-distance optical transmission and fibres with special dispersion properties.
    • 一种具有专门设计的包层以提供单模波导和对弯曲损耗的低灵敏度的微结构光纤。 在一个方面,光纤具有内包层和外包层,每个包括细长特征。 内包层特征具有在0.35至0.50范围内的归一化尺寸,并且外包层特征具有范围为0.5至0.9的归一化尺寸,其中归一化因子是典型特征间距。 该纤维的特征还在于内包层的特征间距大于2.0微米。 在第二方面,纤维具有特殊的非圆形和非等边多边形外截面形状,以机械地确保在相对于低弯曲损耗有利的预定方向上的弯曲。 本发明提供的光纤比目前已知的具有类似尺寸模式区域的单模光纤对宏观弯曲损耗较不敏感,并提供用于长距离光学传输的鲁棒的单模,大模式区域光纤和具有特殊色散的光纤 属性。