Polarization-maintaining multi-core fiber

A multi-core optical fiber and polarization-maintaining fiber core technology, applied in the field of optical communication transmission, can solve the problems of increasing system power consumption and complexity, increasing processing delay, etc., to reduce external interference, improve polarization certainty, and facilitate connection Effect

Inactive Publication Date: 2019-09-20
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This increases system power consumption and complexity, increasing processing latency

Method used

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  • Polarization-maintaining multi-core fiber
  • Polarization-maintaining multi-core fiber
  • Polarization-maintaining multi-core fiber

Examples

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the examples.

[0026] The first example is figure 1 As shown, there are 7 core regions and a total outer cladding 101, and the 7 core regions include 1 central core region and 6 outer core regions equidistantly distributed on the periphery of the central core region , forming a layer of outer core area, the central core area is a polarization maintaining core area, and the polarization maintaining core area includes a polarization maintaining core 301 with a circular cross section and a polarization maintaining inner cladding 401, in Stress units 501 are arranged symmetrically on both sides of the polarization-maintaining core area. The stress units are located between the outer core area and the central core area, and are symmetrical to the two adjacent outer core areas. Boron stress unit, the diameter of the boron-doped stress zone is 20 μm, the core spacing between the boron-doped s...

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Abstract

The invention relates to a polarization-maintaining multi-core fiber. The polarization-maintaining multi-core fiber comprises a plurality of fiber core areas and a total outer cladding layer, wherein the plurality of fiber core areas comprise a central fiber core area and two or more than two outer fiber core areas which are uniformly distributed on the periphery of the central fiber core area at equal intervals. The central fiber core area is a polarization-maintaining fiber core area, each outer fiber core area comprises a fiber core and an inner cladding warping a core layer, and the part out of the fiber core areas is a total outer cladding. The polarization-maintaining multi-core fiber can greatly enhance the spectrum efficiency of the optical transmission system and can improve the optical fiber communication capacity, and the polarization-maintaining fiber core area is arranged to ensure that a waveguide structure has the function of maintaining polarized light and can be used for conducting local oscillator light. In the occasions such as a high-capacity access network of the self-coherent detection or the interconnection of data centers, the polarization certainty of local oscillation light can be improved, an automatic polarization controller is saved, the complexity of a photoelectric device and a DSP (digital signal processor) at a receiving end is reduced, and the system delay is greatly reduced, so that the system cost is reduced.

Description

technical field [0001] The invention relates to a polarization-maintaining multi-core optical fiber, which belongs to the technical field of optical communication transmission. Background technique [0002] With the rise and popularization of cloud computing, Internet of Things, high-definition TV, virtual reality and other large-scale data services, the requirements for the transmission capacity of optical fiber communication networks are getting higher and higher. Through the super-channel multiplexing technology, the capacity of a single fiber can be increased to more than 100Tb / s, approaching the Shannon theoretical limit of a single fiber. Therefore, it is extremely urgent to further research and develop ultra-large-capacity optical fiber communication technology with high spectral efficiency, and to solve the problem of further expansion of optical fiber communication networks. Among them, space division multiplexing (SDM) technology uses multi-core fiber (MCF) or few...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/024G02B6/02G02B6/036
CPCG02B6/024G02B6/02042G02B6/03622G02B6/03627G02B6/0365
Inventor 张心贲唐明杨晨孟悦杨坤彭慎张弛童维军
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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