Polarization-maintaining multi-core fiber

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...

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This increases system power consumption and complexity, increasing processing latency

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