Low-attenuation bending insensitive single-mode optical fiber

A bend-insensitive, single-mode optical fiber technology, applied in clad optical fiber, multi-layer core/clad optical fiber, graded index core/clad optical fiber, etc., can solve the problem of large fluorine doping and increased process control Difficulty and manufacturing costs, low refractive index of the depressed cladding, etc., to achieve low fiber attenuation, reduce the amount of germanium doped in the core layer, and achieve the effect of large effective area

Active Publication Date: 2016-02-17
YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY
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Problems solved by technology

However, in these patents, the refractive index of the depressed cladding is very low, and the amount of flu

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  • Low-attenuation bending insensitive single-mode optical fiber
  • Low-attenuation bending insensitive single-mode optical fiber
  • Low-attenuation bending insensitive single-mode optical fiber

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[0039] The present invention will be further described in detail below in conjunction with the embodiments.

[0040] The optical fiber of this embodiment includes a core layer and a cladding layer. The refractive index of the core layer is distributed in a parabolic shape of α order, and the distribution index α is 1.7-2.3. For the cladding and the outer cladding, the function relationship between the relative refractive index difference Δ(r) of the parabolic core layer and the radius r is as follows: Δ(r)=-Δ1[(r / R1) α -1], where r is the distance from a certain point of the core layer to the center of the fiber core, Δ1 is the maximum relative refractive index difference of the parabolic core layer, and R1 is the radius of the core layer. The relative refractive index difference of the inner cladding is Δ2, and the radius of the inner cladding is R2; the relative refractive index difference of the intermediate cladding is Δ3, and the radius of the intermediate cladding is R3;...

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Abstract

The invention relates to a low-attenuation bending insensitive single-mode optical fiber for an optical communication transmission system. The optical fiber comprises a core layer and a cladding layer. The optical fiber is characterized in that the refractive index of the core layer is distributed according to an alpha-order parabola, and the distribution index alpha is 1.5-9.0; the cladding layer is sequentially formed by an inner cladding layer, an intermediate cladding layer and an outer cladding layer from inside to outside; the maximal refractive index difference delta 1 of the parabola core layer is 0.25-0.45 percent, and the radius R1 of the core layer is 5.0-7.0mu u; the relative refractive index different delta 2 of the inner cladding layer is -0.20-0 percent, and the radius R2 of the inner cladding layer is 7.0-10.0mu m; the relative refractive index difference delta 3 of the intermediate cladding layer is -0.20-0 percent, and the radius R3 of the intermediate cladding layer is 10.0-20.0mu m; and the outer cladding layer is a pure quartz glass layer. The low-attenuation bending insensitive single-mode optical fiber has reasonable refractive index section design and low doping amount, and has excellent attenuation resistance and bending resistance.

Description

technical field [0001] The invention relates to a low-attenuation bend-insensitive single-mode optical fiber used in an optical communication transmission system. Its attenuation performance is better than that of a conventional G.652D optical fiber, and its macrobending loss meets the G.657A1 standard, and it can be completely compared with the G.652D optical fiber. The invention is compatible and belongs to the technical field of optical fiber communication. Background technique [0002] Optical fiber communication has the characteristics of large transmission capacity, long transmission distance, and fast transmission speed, and is widely used in optical communication networks such as long-distance trunk networks, metropolitan area networks, and access networks. The single-mode optical fiber that meets the ITU-TG.652D standard is the most commonly used communication optical fiber. On the one hand, with the continuous development of FTTx, in many cases, fiber-to-the-home ...

Claims

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Application Information

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IPC IPC(8): G02B6/028G02B6/036
CPCG02B6/0285G02B6/0365
Inventor 陈刚朱继红龙胜亚王瑞春拉吉·马泰邱文斌艾靓
Owner YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY
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