Low-attenuation single-mode optical fiber

A single-mode optical fiber and optical fiber technology, applied in clad optical fiber, multi-layer core/clad optical fiber, light guide, etc., to achieve large system redundancy, reduce attenuation increase, and reduce construction and operation costs

Active Publication Date: 2013-06-12
SHANTOU HIGH TECH ZONE AOXING OPTICAL COMM EQUIP
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  • Abstract
  • Description
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  • 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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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 p...

Embodiment 2

[0040] 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.

[0041] 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

The invention relates to a low-attenuation single-mode optical fiber. The low-attenuation single-mode optical fiber comprises a fiber core layer and cladding layers. The low-attenuation single-mode optical fiber is characterized in that a first inner cladding layer and a second inner cladding layer sequentially coat the fiber core layer; the radius R1 of the fiber core layer is 3.5 to 5 mu m, and the relative refractive index difference is 0.2 percent to 0.4 percent; the radius R2 of the first inner cladding layer is 6.5 to 11 mu m, and the relative refractive index difference is -0.06 percent to 0 percent; the radius R3 of the second inner cladding layer is 15 to 30 mu m, and the relative refractive index difference is -0.02 percent to 0.05 percent; the outermost layer is an outer cladding layer; and the outer cladding layer is a pure silica quartz glass layer. By the adoption of a double-inner-cladding-layer structure, the refractive index section of the optical fiber is designed more reasonably. By optimizing doping agents of the fiber core layer and the cladding layers, the material viscosity of the fiber core layer is reduced, the viscosities of the fiber core layer and the cladding layers can be matched, and the increase of optical fiber attenuation caused by stress concentration in a fiber corer part due to drawing tension is effectively avoided. On the basis of comprehensive compatibility with a G.652 standard, the attenuation performance of the optical fiber is much higher than that of a 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 Applications(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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