Small-core-diameter graded index fiber

A technology of graded refractive index and relative refractive index difference, applied in the field of optical communication, can solve the problems that multimode fiber cannot adapt to high network speed, long-distance transmission, expensive transmitting and receiving systems, etc., and achieves mass production and bandwidth performance Effect of Optimization, Bandwidth-Wavelength Sensitivity Reduction

Active Publication Date: 2019-01-11
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Claims
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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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  • Small-core-diameter graded index fiber
  • Small-core-diameter graded index fiber
  • Small-core-diameter graded index fiber

Examples

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Embodiment Construction

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

[0036] 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 contribution of P in the center of the core layer is ΔP0, the contribution of P at the junction of the flat area and the gradient area is ΔP1, and the contribution fluctuation of P in the center of the core layer and the boundary of the flat area is The width of the flat area is T1, the width of the transition area is T2=R1-T1, the contribution of P at the outer edge of the core layer is ΔP2, and the difference between the contribution of P at the outer edge of the flat area and the transition area is ΔP21=ΔP2-ΔP1 ; The contribution of F at the center of the core is ΔF0, and the contribution of F at th...

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Abstract

The invention relates to a small-core-diameter graded index fiber. The small-core-diameter graded index fiber comprises a core layer and claddings; the claddings are an inner cladding, a sunken cladding and an outer cladding in sequence from inside to outside; the small-core-diameter graded index fiber is characterized in that the refractivity profile of the core layer is parabolic, a distributionindex alpha is 1.9-2.1, the radius R1 of the core layer is 10-21 [mu]m, and the maximum relative refractive index difference delta 1max of the center of the core layer is 0.7-1.7%; the core layer isa Ge, P and F-coped silicon dioxide glass layer, the inner cladding is a pure silicon dioxide layer or an F-doped silicon dioxide glass layer, the one-sided width of the inner cladding is 0.5-5 [mu]m,delta 2 is -0.4-0%, and the one-sided width of the sunken cladding is 2-10 [mu]m, delta 3 is -0.8-0.2%; and the outer cladding is a pure silicon dioxide glass layer. The small-core-diameter graded index fiber can be compatible with an existing OM3 / OM4 multimode fiber, and also can support a wavelength division multiplexing technology in a wavelength range of 850-950nm; the small-core-diameter graded index fiber can be compatible with a single mode fiber, and supports single mode transmission of 1,310nm and 1,550nm; and the small-core-diameter graded index fiber has excellent bending-resistantperformance and can be suitable for access networks and miniaturized optical devices.

Description

technical field [0001] The invention relates to a small-core-diameter 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 consumption an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/028G02B6/036G02B6/02
CPCG02B6/02G02B6/0281G02B6/03638G02B6/3825G02B6/3869G02B6/0365G02B6/0288G02B6/03605
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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