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Multi-core optical fiber with gradually-changed core spacing and preparation method of multi-core optical fiber

A multi-core optical fiber, multi-fiber technology, applied in multi-core optical fiber, glass optical fiber, cladding optical fiber, etc., can solve the problems of high control accuracy, difficult preparation, and poor quality of optical fiber coating, and achieves low Loss coupling, ease of operation, improved coating quality

Active Publication Date: 2022-03-01
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the following disadvantages: first, the control precision of the drawing process is high, and the feeding speed and drawing speed need to be adjusted in real time, making the preparation difficult; Difference

Method used

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  • Multi-core optical fiber with gradually-changed core spacing and preparation method of multi-core optical fiber
  • Multi-core optical fiber with gradually-changed core spacing and preparation method of multi-core optical fiber
  • Multi-core optical fiber with gradually-changed core spacing and preparation method of multi-core optical fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as Figure 1-Figure 3 As shown, it is a schematic diagram of a graded-core-spacing optical fiber provided by an embodiment of the present invention. The graded-core-spacing fiber mainly includes: a cladding layer 5 and a core layer 8 located inside the cladding layer. The outer circumference of the core layer layer has an axial Ring-shaped distribution through holes, an optical fiber core 6 is arranged in the axial ring-shaped distribution through holes, a through hole is arranged in the center of the core layer, and a tapered glass rod 3 is placed in the through hole. The length of the tapered glass rod is The axial length of the core layer is consistent with that of the core layer, and is used to cause the core layer to deform to different degrees, so as to obtain a multi-core optical fiber in which the distance between the cores gradually changes along the axial direction of the core layer and the cladding diameter remains unchanged.

[0039] Wherein, the throug...

Embodiment 2

[0045] This embodiment provides a method for preparing the core-spacing graded multi-core fiber in Embodiment 1, comprising the following steps:

[0046]Step 1: Carry out circular grinding on a plurality of optical fiber preforms, insert them into the axial annular distribution through holes of the quartz rods with axial annular distribution through holes, and heat and melt, so that the plurality of optical fiber preforms and the quartz rods Melting and shrinking into one body; wherein, the outer circumference formed from the axial ring-shaped distribution of through holes is the boundary, the core layer is inward to the center of the quartz rod, and the cladding is outward to the outer circumference of the quartz rod.

[0047] Specifically, the optical fiber preform is prepared by the MCVD process, and the outer diameter of the optical fiber preform prepared by this process is between 13 mm and 15 mm. Clamp each optical fiber preform into the chuck of the cylindrical grinder,...

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Abstract

The invention discloses a core spacing gradient multi-core optical fiber and a preparation method thereof, and belongs to the technical field of optical fiber preparation. The core spacing gradient multi-core optical fiber comprises a cladding layer and a core area layer located in the cladding layer, the outer circumference of the core area layer is provided with axially and annularly distributed through holes, and optical fiber cores are arranged in the axially and annularly distributed through holes; a through hole is formed in the center of the core area layer, a conical glass rod is placed in the through hole, and the multi-core optical fiber with the core spacing gradually changing in the axial direction and the cladding diameter unchanged is obtained. According to the invention, low-loss coupling between multi-core optical fibers with the same fiber core distribution and different core spacing can be realized; the quality of the coating layer of the core spacing gradient multi-core optical fiber is improved, and the difficulty of preparing the core spacing gradient multi-core optical fiber is reduced. And the operation process is simple, and the repeatability is good.

Description

technical field [0001] The invention belongs to the technical field of optical fiber preparation, and more specifically relates to a multi-core optical fiber with gradually changing core spacing and a preparation method thereof. Background technique [0002] As an important technology to improve transmission capacity and break capacity bottlenecks, space division multiplexing technology has received more and more attention in recent years. As one of the routes to realize space division multiplexing technology, multi-core optical fiber differs from traditional single-mode optical fiber in that it has multiple cores under the same cladding and has the ability to simultaneously, multi-channel, and independently transmit signals. A single optical fiber The transmission capacity is greatly improved. [0003] According to the size of different core spacing, multi-core fiber can be divided into weak coupling fiber and strong coupling fiber. In the multi-core optical fiber network...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02C03B37/012
CPCG02B6/02042G02B6/02395C03B37/01205C03B37/01211C03B2203/10
Inventor 李进延辜之木褚应波戴能利李海清彭景刚
Owner HUAZHONG UNIV OF SCI & TECH
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