公开(公告)号：US5611016A

公开(公告)日：1997-03-11

申请号：US660639

申请日：1996-06-07

申请人： Robert E. Fangmann ,  Arthur F. Judy ,  James J. Refi

发明人： Robert E. Fangmann ,  Arthur F. Judy ,  James J. Refi

IPC分类号： G02B6/02 ,  G02B6/08 ,  G02B6/34 ,  G02B6/44

CPC分类号： G02B6/02247 ,  G02B6/02257 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/29374 ,  G02B6/441 ,  G02B6/4432 ,  G02B6/4433 ,  G02B6/4401

摘要： A dispersion-balanced optical cable 90 reduces four-photon mixing in Wave Division Multiplexing (WDM) systems and is effective to reduce cumulative dispersion D substantially to zero. The dispersion-balanced optical cable 90 includes one or more optical fibers 90-1 having positive dispersion D.sub.1, and one or more optical fibers 90-2 having negative dispersion D.sub.2. The fibers are singlemode and are suitable for the transmission of optical signals in the 1550 nm region. At this wavelength, the positive-dispersion fibers have a chromatic dispersion of about +2.3 ps/nm.km, and the negative-dispersion fibers have a chromatic dispersion of about -1.6 ps/nm.km. The dispersion-balance optical cable preferably includes an equal number of positive- and negative-dispersion fibers in the same cable. Various cable configurations 60, 80, 90 can be used including: a ribbon 60 which comprises a planar array of optical fibers bound together by a matrix material 65; groups of positive- and negative-dispersion fibers enclosed within a plastic tube 81; or other known configurations. An improved WDM system 100 interconnects two dispersion-balanced cables 90-90, and a crossover connection 105 is made between the positive-dispersion fibers 90-1 of one cable 90 and the negative-dispersion fibers 90-2 of the other cable 90.

摘要翻译： 色散平衡光缆90减少波分复用（WDM）系统中的四光子混合，并且有效地将累积色散D基本上减小到零。 色散平衡光缆90包括具有正色散D1的一个或多个光纤90-1和具有负色散D2的一个或多个光纤90-2。 光纤是单模的，适用于在1550nm区域传输光信号。 在这种波长下，正色散光纤具有约+ 2.3ps / nm.km的色散，负色散光纤具有约-1.6ps / nm.km的色散。 分散平衡光缆优选地在相同的电缆中包括相等数量的正和负分散光纤。 可以使用各种电缆配置60,80,90，包括：带60，其包括由矩阵材料65结合在一起的光纤的平面阵列; 一组包封在塑料管81内的正和负分散纤维; 或其他已知配置。 改进的WDM系统100互连两个色散平衡电缆90-90，并且在一个电缆90的正分散光纤90-1和另一电缆90的负分散光纤90-2之间形成交叉连接105。

公开(公告)号：US4912523A

公开(公告)日：1990-03-27

申请号：US37292

申请日：1987-04-10

申请人： James J. Refi ,  Ian A. White

发明人： James J. Refi ,  Ian A. White

IPC分类号： G02B26/00 ,  G02B6/28 ,  G02B6/34 ,  H04B10/13 ,  H04B10/24

CPC分类号： G02B6/14 ,  G02B6/02071 ,  G02B6/34 ,  H04B10/2503 ,  H04B10/2581

摘要： In an optical fiber communication system that operates at a wavelength .lambda..sub.o and comprises optical fiber having a cut-off wavelength .lambda..sub.c >.lambda..sub.o, a "grating", with parameters chosen such that the grating causes resonant coupling between a predetermined guided mode (e.g., LP.sub.11) and a tunneling-leaky mode, can be advantageously used to remove unwanted guided modes. Such removal can substantially improve the bandwidth of such a system.