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Low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber

A technology with multiple cores, few modes, and air holes, which is applied in the direction of multi-core optical fiber, cladding optical fiber, light guide, etc., can solve the problems of multiple hollow structures, instability, and lower refractive index of the sunken layer, and achieve stable structure and easy preparation , the effect of reducing crosstalk

Inactive Publication Date: 2020-12-15
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main single-hole auxiliary structures. One is to arrange a layer of air holes around the core of the conventional multi-core optical fiber. Although this structure reduces the inter-core crosstalk to a certain extent, its core distance and step The core fiber is basically the same; the other is a multi-core fiber with a photonic crystal fiber structure. This structure can significantly reduce crosstalk between cores at a small core spacing, but it has too many hollow structures and is unstable. The actual preparation of the
Due to the limitations of the doping process of the single trench-assisted structure, the refractive index of the sunken layer cannot be sufficiently reduced, which limits the effect of crosstalk reduction

Method used

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  • Low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber
  • Low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber
  • Low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber

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Embodiment 1

[0047] This embodiment provides a low-crosstalk groove with embedded air holes and double-assisted multi-core few-mode optical fiber, which includes a plurality of few-mode cores, and the multiple few-mode cores are divided into a few-mode core core 1, and set The inner core adopts the hexagonally arranged few-mode fiber core outer core 2, which constitutes a seven-core optical fiber, and the refractive index of the low-crosstalk groove embedded with air holes and double-assisted multi-core few-mode fiber is distributed in steps; each The outer peripheral surface of the few-mode fiber core is provided with an inner cladding 3, and the outer peripheral surface of the inner cladding 3 is provided with a groove area 5, and six air holes 4 are evenly distributed in the groove area 5, and the air holes 4 are arranged in a regular hexagonal shape. There is also provided an outer cladding 6 surrounding all of the structures described above.

[0048] The structure schematic diagram an...

Embodiment 2

[0057] This embodiment provides a low-crosstalk groove embedded air hole double-assisted multi-core few-mode optical fiber, including a plurality of few-mode cores, and the multiple few-mode cores are divided into few-mode core cores 1 and set in The inner core adopts the hexagonally arranged few-mode fiber core and the outer core 2, which constitutes a seven-core optical fiber. The refractive index of the low-crosstalk groove is embedded with air holes and the double-assisted multi-core few-mode fiber is distributed in steps; each few-mode The outer peripheral surface of the fiber core is provided with an inner cladding 3, the outer peripheral surface of the inner cladding 3 is provided with a groove area 5, and six air holes 4 are evenly distributed in the groove area 5, and the air holes 4 are arranged in a regular hexagonal shape. There is an outer cladding 6 which surrounds all the structures described above.

[0058] A schematic diagram of the structure of a low-crosstal...

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Abstract

The invention discloses a low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber, which comprises a plurality of few-mode fiber cores, wherein each few-mode fibercore is sequentially provided with an inner wrapping layer and a groove area from inside to outside, air holes are embedded in the groove areas, and the few-mode fiber core is further provided with an outer wrapping layer surrounding all the structures. According to the low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber, a space channel of the multi-coreoptical fiber and the few-mode optical fibers is utilized, the air hole isolation and groove dual-auxiliary type structural design is adopted, light beams are well limited in the fiber core, adverse effects on the structural stability of the optical fiber due to excessive hollow structures are avoided, the optical fiber structure parameters are reasonably changed, the core spacing is reduced, theinter-core crosstalk is reduced, the transmission capacity and efficiency of an optical communication network are improved, and the optical fiber transmission quality is improved.

Description

technical field [0001] The invention relates to a double-assisted multi-core few-mode optical fiber with air holes embedded in a low-crosstalk groove, belonging to the field of communication optical fibers. Background technique [0002] Space-division multiplexing technology is a key technology for improving the capacity of optical network systems and building next-generation optical communication networks. As the carrier of space-division multiplexing technology, multi-core few-mode optical fiber is an important direction for the development of high-speed and large-capacity networks in the future. However, many problems are still faced in the actual application of optical network links. The design optimization of multi-core optical fibers and the use of limited stable modes transmitted in few-mode optical fibers as independent channels in optical fiber communication systems to transmit information. Compared with single-mode fiber, the transmission capacity and transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
CPCG02B6/02042G02B6/02347
Inventor 程同蕾张继伟汪国瑞张函李曙光闫欣王方张学楠
Owner NORTHEASTERN UNIV
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