Eight-core optical fiber multiplexing and demultiplexing device and its preparation method

A demultiplexer and core optical fiber technology, which is applied in the field of optical transmission devices, can solve the problems that the natural arrangement of optical fiber bundles cannot be guaranteed, and achieve the effect of low overall loss, reduction of loss and crosstalk between cores

Active Publication Date: 2021-04-27
YANGTZE OPTICAL FIBRE & CABLE CO LTD +1
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  • Description
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Problems solved by technology

This preparation method is easy to operate, high in precision, and high in yield, but the arrangement of the multi-core optical fiber must be ring-shaped, and the number of rings should not be too many, otherwise the single-mode fiber bundle will be inserted into a single-hole circular sleeve to draw a taper. Finally, there is no guarantee that the natural arrangement of the fiber bundle is exactly the same as the arrangement of the multi-core fiber every time

Method used

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  • Eight-core optical fiber multiplexing and demultiplexing device and its preparation method
  • Eight-core optical fiber multiplexing and demultiplexing device and its preparation method
  • Eight-core optical fiber multiplexing and demultiplexing device and its preparation method

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preparation example Construction

[0042] Such as figure 1 Shown is a schematic flow diagram of a method for preparing an eight-core optical fiber multiplexing and demultiplexing device provided by an embodiment of the present invention, including the following steps:

[0043] S1: Holes are drilled on the pure silica solid rod according to the core distribution of the eight-core optical fiber to be matched, and the geometric distribution of each hole is the same as that of each core in the eight-core optical fiber to be matched, which is an equal proportional amplification relationship , the hole spacing and the ratio of the distance between the center of the hole and the center of the solid rod are the same as the distance between the cores of the eight-core optical fiber to be matched and the ratio of the center of the fiber core to the center of the fiber. Eight-hole capillary glass sleeve, cut the capillary glass tube into the required length;

[0044] In the embodiment of the present invention, the eight ...

Embodiment 1

[0056] Example 1: Preparation of an annular eight-core optical fiber multiplexing and demultiplexing device

[0057] The core spacing a of the circular eight-core fiber is 31±0.5um, the distance b from the center of each core to the center of the fiber is about 40.5±0.5um, and the outer diameter of the fiber cladding is 125±0.7um.

[0058] Preparation of the annular eight-hole capillary glass cannula:

[0059] Holes are drilled on a pure silica solid rod with a diameter of D = 25-30 mm according to the arrangement of the circular eight-core optical fiber, such as Figure 4 shown. Hole spacing A=6.8±0.1mm, distance B=8.9±0.1mm between the center of the hole and the center of the solid rod. The ratio of A to B is the same as the ratio of a to b. The hole diameter d=5mm. After the drilling is completed, wire drawing is carried out on the wire drawing tower, and the glass sleeve containing eight holes is drawn into an annular eight-hole capillary glass tube with an outer diame...

Embodiment 2

[0067] Example 2: Preparation of rectangular eight-core optical fiber multiplexing and demultiplexing device

[0068] The transverse core spacing a of the rectangular eight-core optical fiber is 32±0.5um, the longitudinal core spacing b is 40±0.5um, and the outer diameter of the fiber cladding is 150±1um.

[0069] Preparation of rectangular eight-hole capillary glass cannula:

[0070] Holes are punched on a pure silica solid rod with a diameter of D=75-80mm according to the arrangement of rectangular eight-core optical fibers, such as Figure 4 shown. Horizontal hole spacing A=14.9±0.2mm, longitudinal hole spacing B=18.6±0.2mm. The ratio of A to B is the same as the ratio of a to b. The hole diameter d=12mm. After the drilling is completed, wire drawing is carried out on the wire drawing tower, and the glass sleeve containing eight holes is drawn into a rectangular eight-hole capillary glass tube with an outer diameter of 620-670um and an inner diameter of about 100um. Du...

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Abstract

The invention discloses an eight-core optical fiber multiplexing and demultiplexing device and a preparation method thereof, belonging to the field of optical transmission devices. Holes are punched on a pure silica solid rod according to the core distribution of the eight-core optical fiber to be matched, and the punched The solid rod with the holes completed is drawn to prepare an eight-hole capillary glass sleeve, and the eight single-core optical fibers are inserted into the cleaned eight-hole capillary glass sleeve one by one, and the first tapering is performed so that the eight single-core optical fibers are The eight-hole capillary glass sleeve is fixed; the second taper is performed to make the geometric size of the capillary glass sleeve and the eight single-core optical fiber bundles smaller until the geometric distribution and size of each single-core optical fiber bundle at the taper waist are the same as those to be matched. The geometric distribution and size of the eight-core optical fiber are the same; it is cut at the waist of the cone and aligned with the eight-core optical fiber to be matched. After fusion, all the bare fiber parts are packaged. Realize low insertion loss and low crosstalk connection between eight single-core optical fibers and a single eight-core optical fiber, and realize multiplexing and demultiplexing of optical signals in eight-core optical fibers.

Description

technical field [0001] The invention belongs to the field of optical transmission devices, and more specifically relates to an eight-core optical fiber multiplexing and demultiplexing device and a preparation method thereof. Background technique [0002] In optical communication networks, space-division multiplexing optical fibers have received extensive attention and research because they can increase the transmission capacity of a single optical fiber by an order of magnitude, break the traditional Shannon limit, and achieve higher bandwidth transmission. Multi-core optical fiber is a kind of space-division multiplexing optical fiber. It accommodates multiple cores while the cladding size of single-mode optical fiber is basically the same or slightly larger, which significantly improves the transmission capacity of a single optical fiber. In data centers and high-performance computing systems, optical interconnection technology is widely used to solve the huge demand for h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/26G02B6/255G02B6/40G02B6/36
CPCG02B6/2551G02B6/2552G02B6/262G02B6/3644G02B6/40
Inventor 沈磊张磊罗杰张睿童朝阳高亮赵君婕
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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