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    • 1. 发明申请
    • 光ファイバ
    • 光纤
    • WO2007023801A1
    • 2007-03-01
    • PCT/JP2006/316391
    • 2006-08-22
    • 住友電気工業株式会社平野 正晃
    • 平野 正晃
    • G02B6/036
    • G02B6/03644G02B6/02214G02B6/02261G02B6/0228G02B6/03627H01S3/06725
    •  この発明は、3階微分値β 3 と2階微分値β 2 との比(β 3 /β 2 )が負であってその絶対値が大きく、そして2階微分値β 2 の絶対値も大きい光パルス拡大用光ファイバに関する。当該光ファイバは、最大屈折率N 1 及び外径2aを有する中心コア部と、該中心コア部の外周に設けられた最小屈折率N 2 及び外径2bを有するディプレスト部と、該ディプレスト部の外周に設けられた最大屈折率N 3 を有するクラッド部を少なくとも備える。中心コア部、ディプレスト部、及びクラッド部それぞれの最大屈折率は、「N 1 >N 3 >N 2 」なる関係を満たす。クラッド部に対する中心コア部の比屈折率差Δ 1 は1.0%より大きく、クラッド部に対するディプレスト部の比屈折率差Δ 2 は-0.3%より小さい。波長1.05μmにおいて、周波数ωによる伝搬定数βの2階微分値β 2 は正であり、周波数ωによる伝搬定数βの3階微分値β 3 は負であり、比(β 3 /β 2 )は-0.002ps以下である。
    • 将光学脉冲展开的光纤,其中第三衍生物β3的比值(β3/3 /β2/3)与二次导数 β2 是负值,该比率的绝对值较大,二阶导数β2的绝对值也较大。 光纤包括具有最大折射率N 1 1和外径2a的中心芯部分,设置在中心芯部分周围并具有最小折射率N 2的凹陷部分 和外径2b,以及设置在凹陷部周围的包层部和最大折射率N 3 3。 中心芯部分,凹陷部分和包层部分的最大指数满足关系“N”1 N 3 > N 2 ”。 中心芯部与包层部的相对折射率差Δ1<1>大于1.0%,凹部与包层部的相对折射率差Δθ2< 小于-0.3%。 传播常数ß的频率α的二阶导数β2 是负值,并且比率(β3 /β2/2)为-0.002ps或更小。
    • 2. 发明申请
    • DISPERSION MANAGED CABLE FOR UNREPEATERED SYSTEMS
    • 对未经授权的系统进行分配管理电缆
    • WO2003088531A1
    • 2003-10-23
    • PCT/US2003/009146
    • 2003-03-24
    • CORNING INCORPORATED
    • BICKHAM, Scott RATWOOD, Thomas JCORNWELL, William DTAYLOR, Nigel H
    • H04B10/18
    • G02B6/02014G02B6/02271G02B6/0228G02B6/29377H04B10/25253
    • Optical fibers of different physical characteristics are combined to produce a hybrid fiber which, at the operating wavelength, has a relatively large effective area and desirable net dispersion and attenuation characteristics over the combined length of the hybrid system. Hybrid fibers are constructed in accordance with the principles of the invention by optically connecting a first fiber having a large effective area (greater than 85 µm2), an attenuation less than .19 dB/km and a dispersion greater than 10 ps/nm/km at 1550 nm, to a second fiber having an effective area which is smaller than the first fiber, a dispersion which is less than 10 ps/nm/km, and an attenuation which is less than .23 dB/km at 1550 nm. Both the first and second fibers preferably have a positive dispersion slope at 1550 nm. The first and second fibers are preferably spliced directly together in order to achieve chromatic dispersion compensation.
    • 不同物理特性的光纤被组合以产生混合光纤,其在工作波长处具有比混合系统的组合长度具有相对较大的有效面积和期望的净色散和衰减特性。 根据本发明的原理通过光学连接具有大的有效面积(大于85μm2),衰减小于.19dB / km和大于10ps / nm / km的色散的第一光纤来构造混合光纤 在1550nm处,具有小于第一光纤的有效面积的第二光纤,小于10ps / nm / km的色散,在1550nm处的衰减小于.23dB / km。 第一和第二纤维优选在1550nm处具有正色散斜率。 优选地将第一和第二纤维直接拼接在一起以实现色散补偿。
    • 7. 发明申请
    • DEVICE FOR THE COMPENSATION OF CHROMATIC DISPERSION
    • 色散补偿装置
    • WO02006874A1
    • 2002-01-24
    • PCT/EP2001/007735
    • 2001-07-05
    • G02B6/02G02B6/12H04B10/2525G02B6/16
    • G02B6/02347G02B6/02261G02B6/0228H04B10/2525
    • A compensating optical fibre length (12) having a negative chromatic dispersion slope, said compensating optical fibre (12) having a core region (13) surrounded by a cladding region (14), the cladding region (14) defining a first ring of holes, which substantially defines, around the core region (13) an annulus with an inner radius r1 and an outer radius r2, and at least one second ring of holes that surrounds the first ring of holes, said holes running along the compensating optical fibre (12) longitudinally and being spaced apart from each other substantially according to a predefined pitch LAMBDA , wherein a) the values of said inner radius r1 and said outer radius r2 are selected to satisfy the following relationship r1 ≤ lambda /n ≤ r2 where n is the refractive index of the material making up the core region (13) of said compensating optical fibre length (12) b) the holes of said first and said at least one second ring are substantially of the same diameter d, and c) the ratio d/ LAMBDA substantially satisfies the following relationship (A) 0.8 ≤ d/ LAMBDA
    • 具有负色散斜率的补偿光纤长度(12),所述补偿光纤(12)具有由包层区域(14)包围的芯区域(13),所述包层区域(14)限定第一环孔 ,其基本上限定在所述芯区域(13)周围具有内半径r1和外半径r2的环,以及围绕所述第一环孔的至少一个第二环孔,所述孔沿着所述补偿光纤( 12)纵向并且基本上根据预定间距LAMBDA彼此间隔开,其中a)选择所述内半径r1和所述外半径r2的值以满足以下关系r1≤λ/n≤r2其中n是 构成所述补偿光纤长度(12)的芯区域(13)的材料的折射率b)所述第一和所述至少一个第二环的孔基本上具有相同的直径d,c) d / LAMBDA基本上满足以下关系式(A)0.8≤d/ LAMBDA <1。
    • 8. 发明申请
    • POSITIVE DISPERSION LOW DISPERSION SLOPE FIBER
    • 正色散低分散斜坡纤维
    • WO0019255A9
    • 2000-10-12
    • PCT/US9920057
    • 1999-08-31
    • CORNING INCMA DAIPINGSMITH DAVID K
    • MA DAIPINGSMITH DAVID K
    • G02B6/02G02B6/036G06T17/20G02B6/22C03B37/012G02B6/16
    • G02B6/03644G02B6/02014G02B6/02238G02B6/02271G02B6/0228G02B6/0281G02B6/0286G02B6/03611G02B6/03633G06T17/20
    • Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described. To eliminate non-linear effects, such as FWM and SPM, which occur in a high performance, high rate systems, the effective area of the waveguide is made to be greater than about 60 mu m , more preferably greater than 65 mu m , and most preferably greater than 70 mu m . The total dispersion is preferably positive and equal to at least 2 ps/nm-km at 1530 nm. This total dispersion together with a total dispersion slope less than about 0.1 ps/nm -km insures a minimum FWM effect over the wavelength window.
    • 公开了具有至少两段的分段芯的单模光波导。 选择芯段的相对折射率,折射率分布和径向尺寸以提供具有适用于在大约1530nm至1570nm的波长窗口中操作的高性能电信系统的性质的光波导纤维。 描述了具有两个,三个和四个段的本发明的实施例。 为了消除在高性能,高速率系统中出现的非线性效应,例如FWM和SPM,使波导的有效面积大于约60平方米,更优选大于65平方米 m 2,最优选大于70μm2。 总色散优选为正值,并且在1530nm处等于至少2ps / nm-km。 该总色散与小于约0.1ps / nm 2 -km的总色散斜率确保了波长窗口上的最小FWM效应。
    • 9. 发明申请
    • NON-LINEAR OPTICAL FIBER, OPTICAL FIBER COIL, AND WAVELENGTH CONVERTER
    • 非线性光纤,光纤线圈和波长转换器
    • WO99010770A1
    • 1999-03-04
    • PCT/JP1998/003010
    • 1998-07-03
    • G02B6/036G02B6/10G02F1/383G02F1/35
    • G02B6/03644G02B6/02028G02B6/02242G02B6/02276G02B6/0228G02B6/03627G02B6/03655G02B6/105G02F1/383
    • A non-linear optical fiber capable of producing non-linear optical phenomena at high efficiency, an optical fiber coil composed of coiled non-linear optical fibers, and a wavelength converter provided with the non-linear optical fiber. The non-linear optical fiber in particular has characteristics for input light of a predetermined wavelength, which include a modal field diameter of 5 mu m or less, a polarization dispersion of 1 ps/km or a constant plane of polarization, a zero-dispersion wavelength of 1.5 mu m to 1.6 mu m, a cutoff wavelength of 1.4 mu m to 1.7 mu m for a fiber length of 2 m, a transmission loss of 3 dB/km or less, and a non-linear coefficient of 10/W/km or higher. With this configuration the non-linear optical fiber can generate highly efficiently desired converted light by the non-linear phenomena.
    • 能够以高效率产生非线性光学现象的非线性光纤,由线圈非线性光纤构成的光纤线圈和设置有非线性光纤的波长转换器。 非线性光纤特别地具有预定波长的输入光的特性,其包括5μm或更小的模场直径,1ps / km 1/2的偏振色散或恒定的偏振平面 ,1.5μm至1.6μm的零色散波长,光纤长度为2μm的截止波长为1.4μm至1.7μm,传输损耗为3dB / km或更小,非线性 系数在10 / W / km以上。 通过这种配置,非线性光纤可以通过非线性现象产生高效率的所需转换光。