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A low-attenuation single-mode fiber

A single-mode optical fiber, low-attenuation technology, applied in clad optical fiber, multi-layer core/clad optical fiber, light guide, etc., to achieve reasonable design of refractive index profile, reduce construction and operation costs, and increase the distance without repeaters

Active Publication Date: 2016-02-24
SHANTOU HIGH TECH ZONE AOXING OPTICAL COMM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent does not address the optical transmission properties of optical fibers

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  • A low-attenuation single-mode fiber
  • A low-attenuation single-mode fiber
  • A low-attenuation single-mode fiber

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Embodiment 1

[0029] Embodiment 1: including a core layer and a cladding layer, the core layer is composed of quartz glass doped with fluorine and other dopants: there are three cladding layers outside the core layer. The first inner cladding closely surrounds the core layer, which is made by the same PCVD deposition method as the core layer; the second inner cladding is composed of fluorine-doped quartz glass; the third cladding is the outer cladding, which closely surrounds all the components of the second inner cladding The layer is a pure silicon dioxide layer prepared by OVD process, with a diameter of 125 μm.

[0030] According to the technical scheme of the above-mentioned single-mode optical fiber, the parameters of the optical fiber are designed within the specified range, and the core rod is manufactured according to the design requirements of the optical fiber through the mandrel manufacturing process such as PCVD deposition process, and the sleeve process, OVD process, etc. The ...

Embodiment 2

[0039] Embodiment 2: including a core layer and a cladding layer, the core layer is composed of quartz glass doped with fluorine and other dopants: there are three cladding layers outside the core layer. The first inner cladding closely surrounds the core layer, which is made by the same PCVD deposition method as the core layer; the second inner cladding is composed of fluorine-doped quartz glass; the third cladding is the outer cladding, which closely surrounds all the components of the second cladding layer, a pure silica layer prepared by APVD or VAD, with a diameter of 125 μm.

[0040] According to the technical scheme of the above-mentioned single-mode optical fiber, the parameters of the optical fiber are designed within the specified range, and the core rod is manufactured according to the design requirements of the optical fiber through the mandrel manufacturing process such as PCVD deposition process, and the mandrel is manufactured through the sleeve process, APVD or ...

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Abstract

A low-attenuation single-mode optical fiber, comprising a fiber core layer and cladding layers; the fiber core layer is sequentially cladded with a first inner cladding layer and a second inner cladding layer; the fiber core layer has a radius R1 of 3.5 μm - 5 μm, and a relative refractive index difference Δn1 of 0.2%-0.4%; the first inner cladding layer has a radius R2 of 6.5 μm - 11 μm, and a relative refractive index difference Δn2of -0.06%-0%; the second inner cladding layer has a radius R3 of 15 μm - 30 μm, and a relative refractive index differenceΔn3 of -0.02%-0.05%; and the outermost layer is an outer cladding layer of pure silicon dioxide quartz. The optical fiber employs a double inner cladding layer structure, thus allowing for a more reasonable design of the refractive-index profile of the optical fiber, and the dopant for the fiber core layer and the cladding layers is optimized so as to reduce the viscosity of the fiber core material to match the viscosity of the fiber core layer and the cladding layers, thus effectively reducing the increased optical fiber attenuation resulting from concentration of the stress in the fiber core portion caused by tension from pulling the wires. In addition to the full compatibility with the G.652 standard, the optical fiber has much better attenuation performance than the conventional G.652 optical fiber.

Description

technical field [0001] The invention relates to the field of optical fiber transmission, in particular to a single-mode optical fiber with lower attenuation used in an optical communication transmission system. Background technique [0002] As the transmission medium of the current optical fiber communication network, single-mode optical fiber is widely used from long-distance trunk network to metropolitan area network and access network. As a milestone in the development of optical communication, EDFA optical amplification technology and wavelength division multiplexing technology (WDM) have greatly improved the transmission capacity distance product of optical communication systems. High-speed, large-capacity and long-distance transmission has become a research hotspot in the optical fiber communication industry. The 40G commercial system has been continuously evolving to the 100G system, and the super 100G system has also achieved certain research results in the experimen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036G02B6/02
CPCG02B6/03655
Inventor 龙胜亚王润涵张磊周红燕李灿肖文丽孙梦珣
Owner SHANTOU HIGH TECH ZONE AOXING OPTICAL COMM EQUIP
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