Array type polarization-maintaining multicore fiber

Abstract

The invention relates to an array type polarization-maintaining multicore fiber. The array type polarization-maintaining multicore fiber comprises a total outer cladding layer and fiber core units, and the array type polarization-maintaining multicore fiber is characterized in that: the array type polarization-maintaining multicore fiber further comprises stress units, the fiber core units and the stress units are distributed to form a unit array; the unit array comprises a central unit, and the distance between any unit and the adjacent unit is equal; there are at least one pair of stress units; each pair of stress units are distributed symmetrically around one fiber core unit to form a polarization-maintaining fiber core unit; each fiber core unit comprises a fiber core and an inner cladding layer which surrounds the core layer; and the fiber core units and the parts out of the stress units are the total outer cladding layer. The array type polarization-maintaining multicore fiber greatly enhances the spectral efficiency of the optical transmission system, improves the optical fiber communication capacity, arranges the polarization-maintaining fiber core in the multicore fiber to ensure that a waveguide structure has the function of maintaining polarized light, can effectively improve the polarization certainty of local oscillator light, saves an automatic polarization controller, reduces the complexity of a photoelectric device and a DSP at a receiving end, and greatly reduces the system delay, thereby reducing the system cost.

Description

technical field [0001] The invention relates to an array type polarization-maintaining multi-core optical fiber, which belongs to the technical field of optical communication transmission. [0002] technical background [0003] 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-cor...

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