Multi-core polarization maintaining fiber and manufacturing method thereof

Abstract

The invention relates to a multi-core polarization maintaining fiber and a manufacturing method thereof. The multi-core polarization maintaining fiber comprises: a pure quartz cladding, five fiber cores, two stress boron rods and two round holes. On the cross section of the multi-core polarization maintaining fiber, one fiber core is positioned in a circle centre, and the rest four fiber cores are positioned on the same circumference and distributed uniformly. The two stress boron rods and the two round holes are positioned in the same circumference and distributed alternatively. The multi-core polarization maintaining fiber and the manufacturing method thereof ensure that each fiber core has high polarization maintaining characteristics, so the fiber can meet large-capacity transmission and has high optical transmission quality.

Description

Multi-core polarization maintaining fiber and manufacturing method thereof Technical field The invention relates to a polarization maintaining optical fiber, in particular to a multi-core polarization maintaining optical fiber and a manufacturing method thereof. Background technique Polarization-maintaining fiber is a special fiber developed in the 1980s. Because of its excellent polarization-maintaining characteristics, its applications are extremely wide, including high-precision fiber optic gyroscopes, multiplexed coherent communications, polarization sensing, and fiber lasers. Polarization-maintaining fibers include stress-type birefringent polarization-maintaining fibers, geometrical polarization-maintaining fibers, and waveguide-type polarization-maintaining fibers. Stress-type birefringence polarization-maintaining fibers mainly include panda-type polarization-maintaining fibers, elliptical-clad polarization-maintaining fibers and bow-tie-type polarization-maintaining f...

AI Technical Summary

Problems solved by technology

In the usual sense, a multi-core fiber refers to an optical fiber composed of a group of axially parallel multiple fiber cores placed in an ordinary fiber cladding. This multi-core fiber is processed by introducing light into multiple cores. Transmission, each fiber core has the transmission characteristics of ordinary single-core fiber, but basically does not have polarization maintaining characteristics

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