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。

公开(公告)号：US07155099B2

公开(公告)日：2006-12-26

申请号：US10344685

申请日：2001-08-13

申请人： Neil Gregory Raphael Broderick ,  Daniel William Hewak ,  Tanya Mary Monro ,  David John Richardson ,  Yvonne Deana West

发明人： Neil Gregory Raphael Broderick ,  Daniel William Hewak ,  Tanya Mary Monro ,  David John Richardson ,  Yvonne Deana West

IPC分类号： G02B6/20

CPC分类号： G02B6/02347 ,  C03B37/01205 ,  C03B37/0122 ,  C03B2201/60 ,  C03B2201/62 ,  C03B2201/70 ,  C03B2201/78 ,  C03B2201/80 ,  C03B2201/82 ,  C03B2201/83 ,  C03B2201/84 ,  C03B2201/86 ,  C03B2201/88 ,  C03B2203/14 ,  C03B2203/42 ,  C03C13/04 ,  C03C13/041 ,  C03C13/046 ,  C03C13/048 ,  C03C25/106 ,  C03C25/1062 ,  G02B6/02361

摘要： To overcome problems of fabricating conventional core-clad optical fibre from non-silica based (compound) glass, it is proposed to fabricate non-silica based (compound) glass optical fibre as holey fibre i.e. one contining Longitudinal holes in the cladding. This removes the conventional problems associated with mismatch of the physical properties of the core and clad compound glasses, since a holey fibre can be made of a single glass composition. With a holey fibre, it is not necessary to have different glasses for the core and cladding, since the necessary refractive index modulation between core and cladding is provided by the microstructure of the clad, i.e. its holes, rather than by a difference in materials properties between the clad and core glasses. Specifically, the conventional thermal mismatch problems between core and clad are circumvented. A variety of fibre types can be fabricated from non-silica based (compounds) glasses, for example: single-mode fibre; photonic band gap fibre; highly non-linear fibre; fibre with photosensitivity written gratings and other refractive index profile structures; and rare-earth doped fibres (e.g. Er, Nd, Pr) to provide gain media for fibre amplifiers and lasers.

公开(公告)号：US06614975B2

公开(公告)日：2003-09-02

申请号：US09753489

申请日：2001-01-03

申请人： David John Richardson ,  Neil Gregory Raphael Broderick ,  Herman Leonard Offerhaus ,  Liang Dong ,  Rowland Sammut

发明人： David John Richardson ,  Neil Gregory Raphael Broderick ,  Herman Leonard Offerhaus ,  Liang Dong ,  Rowland Sammut

IPC分类号： G02B602

CPC分类号： G02B6/03666 ,  G02B6/02019 ,  G02B6/02047 ,  G02B6/03611 ,  H01S3/06708

摘要： An optical fibre has a cladding layer surrounding a core, the cladding layer comprising at least a first, relatively inner generally cylindrical region, a third, relatively outer generally cylindrical region, and a second region disposed between the first and third regions, the second region having a higher refractive index than the first and third regions; and the peak difference in refractive index between the first cladding region and the core being less than about 0.0030.

摘要翻译： 光纤具有围绕芯的包覆层，所述包层至少包括第一相对内部的大致圆柱形区域，第三相对外部的大致圆柱形区域和设置在第一和第三区域之间的第二区域，第二区域 具有比第一和第三区域更高的折射率; 并且第一包层区域和芯之间的折射率的峰值差小于约0.0030。