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1. 发明授权

US06577801B2 Holey optical fibers 有权
标题翻译：多孔光纤
公开(公告)号：US06577801B2
公开(公告)日：2003-06-10
申请号：US10003726
申请日：2001-11-02
申请人： Neil Gregory Raphael Broderick , Peter Jonathan Bennett , Tanya Mary Monro , David John Richardson
发明人： Neil Gregory Raphael Broderick , Peter Jonathan Bennett , Tanya Mary Monro , David John Richardson
IPC分类号： G02B604
CPC分类号： G02B6/02347 , B82Y20/00 , G02B6/02 , G02B6/1225
摘要： The percentage fraction of fundamental mode power located in the cladding holes of different holey fibers (PFholes) is shown as a function of wavelength in microns of the fundamental mode (&lgr;). Properties of two groups of holey fibers are shown. The upper group of three curves shows embodiments of the invention with &Lgr;=0.75 &mgr;m and d/&Lgr;=0.6, 0.7 & 0.8 respectively, where d is the hole diameter and &Lgr; the hole spacing or pitch. The lower group of curves, which are almost superimposed on each other, show properties of holey fibers representative of the prior art with &Lgr;=3.2 &mgr;m and d/&Lgr;=0.6, 0.7 & 0.8 respectively. A huge improvement in the mode power present in the holes is evident. In the prior art curves, the mode power fraction is generally less than 1%, whereas with the illustrated embodiments of the invention, holey fibers with 10-40% of the fundamental mode power in the holes are achieved. Generally the holey fiber should be structured such that the wavelength of the guided light &lgr;>2.2&Lgr;. For telecommunications wavelengths, this means that the hole spacing should be smaller than typical in the prior art, i.e. around 1 &mgr;m or less, and the hole diameter should be as large as possible in relation to the hole spacing, preferably d/&Lgr;>=0.6.
摘要翻译：位于不同多孔纤维（PFholes）的包层孔中的基模功率的百分比分数显示为基波模式（lambd）的波长的函数。显示两组多孔纤维的性质。上面的三组曲线分别表示LAMBD =0.75μm和d / LAMBD = 0.6,0.7＆0.8的本发明的实施例，其中d是孔直径和LAMBD孔间距或间距。几乎彼此叠加的较低的曲线组显示出代表现有技术的多孔纤维的性质，分别为LAMBD =3.2μm和d / LAMBD = 0.6,0.7＆0.8。洞中模式力量的巨大改进是显而易见的。在现有技术的曲线中，模式功率分数通常小于1％，而对于本发明的所示实施例，实现了孔中具有10-40％基模功率的多孔光纤。通常，多孔纤维的结构应使导光体的波长大于2.2LAMBD。对于电信波长，这意味着孔间距应该小于现有技术中的典型值，即约为1um或更小，并且孔直径应该相对于孔间距尽可能大，优选地d / LAMBD> = 0.6。

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