Multi-core optical fiber

Abstract

The invention relates to a multi-core optical fiber for communication. The multi-core optical fiber comprises 7 fiber core regions and a main wrapping layer, and is characterized in that the 7 fiber core regions consists of a center fiber core region and 6 outer fiber core regions which are uniformly distributed at the periphery of the center fiber core region; the core wrapping layer structures of the fiber core regions are the same; a fiber core distance between any two adjacent fiber core regions is the same; each fiber core region comprises a fiber core and an inner wrapping layer and a sunken wrapping layer which wrap a core layer; the residual part is the main outer wrapping layer. The fiber core regions of the multi-core optical fiber are reasonably arranged, so that the multi-core optical fiber is compact in structure and is particularly suitable for a dense wiring or long-distance optical fiber communication environment such as a data center; furthermore, the multi-core optical fiber is high in bending resistance and has extremely small influence on crosstalk between any two cores; under a bending condition, the crosstalk performance can completely meet an error rate requirement of high-speed transmission, and high practicability is achieved; the cutoff wavelength, the chromatic dispersion, the mode field, the PMD (polarization mode dispersion) and the like of the optical fiber can be compatible with those of an optical fiber G.652, thus meeting a requirement on multi-core optical fiber communication.

Description

technical field [0001] The invention relates to a multi-core optical fiber and belongs to the technical field of optical fiber communication. Background technique [0002] The capacity of optical fiber communication develops at a speed of nearly 10 times every 4 years, which greatly exceeds the Moore's law of semiconductors. However, the capacity of optical fiber communication is affected by factors such as optical fiber nonlinearity, and it is generally estimated that the maximum is 100Tb / s. In recent years, a single-wavelength 1Tb / s transmission system has been developed, and a wavelength division multiplexing system with a total capacity of tens of Tb / s has also been realized in a single optical fiber. However, in the face of the advent of the big data era and the transmission requirements of big data streams such as videos and pictures, the existing network is still unable to solve the problem of network congestion. [0003] Therefore, scientists consider that the tran...

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Problems solved by technology

Once under bending conditions, the increase of optical fiber crosstalk will lead to an increa

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