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Optical fiber cable with controlled helix-plus-efl values and methods therefor

A fiber excess length, helical technology, applied in the field of fiber optic cable, can solve problems such as attenuation or polychromatic dispersion that have not been discussed

Inactive Publication Date: 2005-07-20
CORNING CABLE SYST LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, US Patent 4,478,488 describes selective time compression and event delay of optical signals, but does not discuss issues related to attenuation or polychromatic dispersion

Method used

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  • Optical fiber cable with controlled helix-plus-efl values and methods therefor
  • Optical fiber cable with controlled helix-plus-efl values and methods therefor
  • Optical fiber cable with controlled helix-plus-efl values and methods therefor

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Embodiment Construction

[0018] refer to figure 1 , which shows and describes an exemplary fiber optic cable 10 for use in an optical transmission system such as a dispersion managed cable system (DMCS). The cables according to the invention may be of loose tube type construction and may comprise one silica-based fiber type, or they may define a hybrid design comprising at least two different fiber types. For example, a fiber optic cable may include both positive dispersion compensating fiber and negative dispersion compensating fiber (DMCS fiber), or a combination of one type of dispersion managed fiber and a non-DMCS fiber, such as manufactured by and available from Corning Incorporated LEAF  , SMF-28 or METROCOR TM optical fiber. However, other suitable cable structures can also use the concept of the present invention, for example instead of a tube used as a fiber carrier, other suitable carriers can also be used to route the optical fibers within the cable. For example, the carrier may also ...

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PUM

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Abstract

Fiber optic cables, and methods of manufacturing the same, include a plurality of carriers having at least one optical fiber therein. In one embodiment, the carriers are arranged in two layers within the cable and are generally disposed about a center area of the cable. Each layer has a respective helix-plus-EFL value. A difference between the respective helix-plus-EFL values of the layers defines a differential range being, preferably, about 1% or less. Additionally, the fiber optic cables can be used in fiber optic cable systems such as dispersion managed cable systems (DMCS).

Description

[0001] Cross References to Related Applications [0002] This invention is a continuation-in-part of pending US Patent Application Serial No. 10 / 035,769, filed December 26, 2001, which is incorporated herein by reference. technical field [0003] The present invention relates to the field of optical cables, and in particular to optical cables having optical fibers whose optical performance characteristics are managed for signal transmission performance in high data rate systems. Background technique [0004] Optical cables are used to transmit telephone, television, and computer data information in non-multiplexed and multiplexed optical transmission systems, in indoor and outdoor environments. In WDM systems, optical performance characteristics play a very important role in maintaining high data rate transmission. [0005] Optical attenuation, loss of transmitted power, polychromatic dispersion, differential transit times of adjacent wavelengths, etc. are examples of optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/34G02B6/44
CPCG02B6/4413G02B6/441G02B6/29377G02B6/4484
Inventor 戴维·A·塞登威廉姆·S·杰克曼
Owner CORNING CABLE SYST LLC