Parallel array multi-core fiber and preparation method thereof

Abstract

The invention provides a parallel array multi-core fiber and a preparation method thereof. Firstly, specially prepared fiber core filigree member is sectionally cut out according to certain length to obtain a group of fiber core filigrees with the same standard performance; the group of fiber core filigrees is tightly adjacent and is clamped between two high purity semi-column structure silica glass members, and is inserted into a high purity quartz outer sleeve after combination, so that a parallel array fiber core fiber preformed bar is formed; the group of the fiber core has the same axial direction with the quartz outer sleeve, and is positioned at the diameter position of the end face of the quartz outer sleeve; one end of the parallel array fiber core fiber preformed bar is sintered and sealed by high temperature oxyhydrogen flame, and then drawn into parallel array core fiber on a fiber wire-drawer-tower; in the process of fiber wire-drawing, a negative pressure is applied at the other end of the fiber preformed bar that is non-sintering end. The processing size is easy to control and the processing technology is simple and convenient, so the technology used for preparing the whole fiber preformed bar is simple, convenient and reliable, and has good economical efficiency.

Description

(1) Technical field

[0001] The invention relates to an optical fiber and a preparation method thereof, in particular to a parallel array multi-core optical fiber and a preparation method thereof. (2) Background technology

[0002] A multi-core optical fiber in the usual sense refers to an optical fiber formed by placing a group of axially parallel multiple optical fiber cores in an ordinary optical fiber cladding. The optical properties of this multi-core fiber are achieved by directing light into multiple fiber cores. Generally, the diameter of a single fiber core is between a few microns and tens of microns, and the outer diameter of the entire fiber is 125 μm. In order to obtain the required light transmission characteristics of the optical fiber, the fabrication of the optical fiber preform usually adopts the deposition of elements such as germanium and phosphorus in the ordinary quartz matrix material, so that the refractive index of the optical fiber core is higher th...

Images