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Single mode optical fiber

A single-mode optical fiber and optical fiber technology, which is applied in the field of optical communication, can solve the problems of difficult process realization and high manufacturing cost, and achieve the effects of reduced manufacturing process difficulty, good matching, and improved viscosity mismatch

Active Publication Date: 2013-12-18
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, the more F-doped content in the cladding, the more difficult it is to realize the process and the higher the manufacturing cost

Method used

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Examples

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Embodiment Construction

[0035] Detailed examples will be given below to further illustrate the present invention.

[0036] The single-mode optical fiber in the embodiment of the present invention includes a core layer and a cladding layer. The core layer 00 is composed of silica glass doped mainly with fluorine (F) or silica glass doped with fluorine and other dopants; surrounding the core layer is layers. The cladding has three layers. The inner cladding 10 closely surrounds the core layer and is composed of fluorine (F)-doped quartz glass; the intermediate cladding 20 closely surrounds the inner cladding and is composed of fluorine (F)-doped quartz glass. The relative refractive index Δ3 is greater than Δ2, the outer cladding 30 closely surrounds the middle cladding, the radius R4 of the outer cladding is 62 μm to 63 μm, and the outer cladding is a pure silica quartz glass layer, that is, its relative refractive index Δ4 is ​​0%.

[0037] According to the technical scheme of the above-mentioned si...

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Abstract

The invention relates to a low-attenuation single mode optical fiber used in an optical fiber communication system. The single mode optical fiber comprises a core layer and a wrapping layer. The single mode optical fiber is characterized in that the refractive index distribution n (r) of the core layer and the g-type refractive index distribution of the core layer meet the formula: n (r)=n0*[1-2*delta 1*(r / R1)*g]*1 / 2 (r<=R1), the delta 1 of the core layer ranges from -0.05% to +0.05%, g ranges from 10 to 30, and the radius R1 of the core layer ranges from 4.0 microns to 5.0 microns; the wrapping layer sequentially comprises an inner wrapping layer, a middle wrapping layer and an outer wrapping layer from inner to outer, the delta 2 of the inner wrapping layer ranges from -0.3% to -0.45%, the radius R2 ranges from 20 microns to 30 microns, and the delta 3 of the middle wrapping layer is larger than delta 2, the numerical relationship between the relative refraction difference and the radius of the middle wrapping layer and the relative refraction difference and the radius of the inner wrapping layer is V=(R3-R2)*(delta 3-delta 2), and V ranges from 0.5*10-2-micron% to 7*10-2-micron%. The attenuation coefficient, at the 1550-nanometer position, of the optical fiber is smaller than or equal to 0.180dB / km. The low-attenuation single mode optical fiber is low in optical fiber loss, good in manufacturing technology, low in cost and suitable for scale production.

Description

technical field [0001] The invention relates to a low-attenuation single-mode optical fiber used in an optical communication system. The optical fiber has low optical fiber loss and good production applicability, and belongs to the technical field of optical communication. Background technique [0002] Single-mode fiber has the advantages of light weight, small size, anti-electromagnetic interference, fast transmission rate, large information capacity and long transmission distance. Worldwide, G.652 single-mode optical fibers have been laid and applied in large quantities in optical communication networks. With the further development of related optical devices, optical amplification technology and related modulation and demodulation technology, the optical communication system is continuously developing in the direction of higher transmission rate and longer transmission distance. The development of optical communication systems has also put forward more stringent requirem...

Claims

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Application Information

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IPC IPC(8): G02B6/02G02B6/036
Inventor 杨晨龙胜亚朱继红黄利伟曹蓓蓓罗杰
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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