A Compatible Graded-Index Optical Fiber with Small Core Diameter

A graded index, compatible technology, applied in the field of optical communication, can solve the problem that multimode fiber cannot adapt to high network rate, long-distance transmission, expensive transmitting and receiving system, etc., and achieves reduced bandwidth-wavelength sensitivity and optimized bandwidth performance. , the effect of easy diffusion

Active Publication Date: 2020-05-26
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Existing multimode fiber cannot adapt to high-speed and long-distance transmission in the network, while single-mode fiber can meet high-speed and long-distance transmission but requires expensive transmitting and receiving systems

Method used

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  • A Compatible Graded-Index Optical Fiber with Small Core Diameter
  • A Compatible Graded-Index Optical Fiber with Small Core Diameter
  • A Compatible Graded-Index Optical Fiber with Small Core Diameter

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Embodiment Construction

[0037] Specific examples will be given below to further illustrate the present invention.

[0038]The optical fiber includes a core layer and a cladding layer. The refractive index profile of the core layer is parabolic, α is 1.9-2.1, the radius of the core layer is R1, and the maximum relative refractive index difference Δ1max at the center of the core layer is 0.7%-1.7%. The cladding is sequentially composed of an inner cladding, a sunken cladding and an outer cladding from the inside to the outside, the radius of the inner cladding is R2, and the P concentration change of the inner cladding is divided into a flat zone and a gradient zone from the inside to the outside, and the flat zone The concentration of P remains basically unchanged, the concentration of P in the gradient region gradually increases or decreases, the width of the flat region is T1, and the width of the gradient region is T2; the contribution of F doping is ΔF2, and the contribution of P at the outer edge ...

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Abstract

The invention relates to a small-core-diameter compatible gradient index fiber which comprises a core layer and a coating. The coating comprises an inner coating, a sinking coating and an outer coating from inside to outside successively. The fiber is characterized in that a reflective index profile of the core layer is parabolic, a distribution index alpha ranges from 1.9 to 2.1, the radius R1 ofthe core layer ranges from 10 to 21 micron, the maximal relative reflective index difference Delta1max of the center of the core layer ranges from 0.7% to 1.7%, and the core layer is a silica glass layer doped with Ge, P and F; the width (R2-R1) of the inner coating ranges from 1.0 to 5.0 micron, the relative refractive index difference Delta2 ranges from -0.30% to 0.90%, and the inner coating includes a silica glass layer doped with P and F; the width (R3-R2) of the sinking coating ranges from 2 to 10 micron, and the relative refractive index difference Delta2 ranges from -0.8% to -0.2%; andthe outer coating includes a pure silica glass layer. The gradient index fiber is compatible with OM3 / OM4 multi-mode fibers and can support the wavelength division multiplexing technology within thewavelength range of 850 to 950nm; the gradient index fiber is also compatible with a single-mode fiber and supports single-mode transmission of 1310nm and 1550nm; and the gradient index fiber has highbending resistance.

Description

technical field [0001] The invention relates to a small-diameter compatible graded-refractive-index optical fiber, which belongs to the technical field of optical communication. Background technique [0002] Multimode fiber and VCSEL Multimode transceivers, singlemode fiber and singlemode transceivers can all be used in data centers. Among them, in emerging ultra-large data centers, the utilization rate of single-mode transmission systems is higher to meet the data center's demand for longer transmission distances. Benefiting from the lower cost and power consumption of VCSEL optical modules, the multimode transmission system still dominates the transmission within 100m. Due to intermodal dispersion, the multimode fiber has a smaller bandwidth-distance product. As data centers continue to increase their bandwidth and transmission distance requirements, the application of multimode will be further limited. [0003] Compared with single-mode transceivers, the power consumpt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/028G02B6/036
CPCG02B6/0281G02B6/0365
Inventor 肖武丰王润涵黄荣王海鹰张安林杨笛王铁军
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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