Multi-core erbium-doped super-mode optical fiber for gain equalization

A gain equalization, optical fiber technology, applied in the fields of special optical fiber, signal processing, and optical fiber communication, can solve the problems of rarely reported amplifiers, increased bit error rate at the receiving end, and damage to the communication system.

Active Publication Date: 2021-04-27
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different mode field distributions of different LP modes in the multi-core supermode fiber, when the signal is amplified, there will be a gain competition between the signal modes, so as to obtain different gains (because the fundamental mode energy is more concentrated, the general fundamental mode obtained The gain is the largest), and the transmiss

Method used

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  • Multi-core erbium-doped super-mode optical fiber for gain equalization
  • Multi-core erbium-doped super-mode optical fiber for gain equalization
  • Multi-core erbium-doped super-mode optical fiber for gain equalization

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Embodiment 1

[0018] A multi-core erbium-doped supermode optical fiber for gain equalization, the optical fiber includes: nineteen cores, cladding and active doping regions; the specific structure is:

[0019] A multi-core erbium-doped supermode fiber for gain equalization is characterized in that: the multi-core erbium-doped supermode fiber contains nineteen cores, which are respectively the center core (1) and the first layer core (1 -1)~(1-6) and the second layer of cores (2-1)~(2-12), nineteen cores are evenly distributed in a regular hexagon, located in the same cladding (2), the cores The radius is between 4-6 μm, the core spacing is between 10-16 μm, and the erbium ions are in the first layer of cores (1-1)~(1-6) and the second layer of cores except the central core (1). Doping in (2-1)~(2-12).

[0020] The multi-core erbium-doped supermode fiber used for gain equalization in this embodiment adopts the first layer of single-ring doping, and the structure is as follows figure 2 sho...

Embodiment 2

[0022] A multi-core erbium-doped supermode optical fiber for gain equalization, the optical fiber includes: nineteen cores, cladding and active doping regions; the specific structure is:

[0023] A multi-core erbium-doped supermode fiber for gain equalization is characterized in that: the multi-core erbium-doped supermode fiber contains nineteen cores, which are respectively the center core (1) and the first layer core (1 -1)~(1-6) and the second layer of cores (2-1)~(2-12), nineteen cores are evenly distributed in a regular hexagon, located in the same cladding (2), the cores The radius is between 4-6 μm, the core spacing is between 10-16 μm, and the erbium ions are in the first layer of cores (1-1)~(1-6) and the second layer of cores except the central core (1). Doping in (2-1)~(2-12).

[0024] The multi-core erbium-doped supermode fiber used for gain equalization in this embodiment adopts double trapezoidal doping, and the structure is as follows image 3 shown.

Embodiment 3

[0026] A multi-core erbium-doped supermode optical fiber for gain equalization, the optical fiber includes: nineteen cores, cladding and active doping regions; the specific structure is:

[0027] A multi-core erbium-doped supermode fiber for gain equalization is characterized in that: the multi-core erbium-doped supermode fiber contains nineteen cores, which are respectively the center core (1) and the first layer core (1 -1)~(1-6) and the second layer of cores (2-1)~(2-12), nineteen cores are evenly distributed in a regular hexagon, located in the same cladding (2), the cores The radius is between 4-6 μm, the core spacing is between 10-16 μm, and the erbium ions are in the first layer of cores (1-1)~(1-6) and the second layer of cores except the central core (1). Doping in (2-1)~(2-12).

[0028] The multi-core erbium-doped supermode fiber used for gain equalization in this embodiment adopts rectangular doping, and the structure is as follows Figure 4 shown.

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Abstract

The invention discloses a multi-core erbium-doped super-mode optical fiber for gain equalization, and belongs to the field of special optical fibers, optical fiber communication and signal processing. The multi-core optical fiber comprises nineteen cores, comprising a central core (1), first-layer cores (1-1)-(1-6) and second-layer cores (2-1)-(2-12), wherein the nineteen cores are uniformly distributed in a regular hexagon shape and are positioned in the same cladding (2), the radius of each core is 4-6 [mu]m, and the distance between the cores is 10-16 mu m. Due to the fact that the space between the cores is small, the nineteen cores jointly form a high-refractive-index area (3), in the area (3), the optical fiber supports super-mode transmission, and the number of scalar modes supported by the optical fiber ranges from 4 to 15. Erbium ions are doped in the first-layer cores (1-1)-(1-6) and the second-layer cores (2-1)-(2-12) except the central core (1), so that the gain of a fundamental mode is reduced, and the gain balance of the fundamental mode and a high-order mode is realized.

Description

technical field [0001] The invention relates to a multi-core erbium-doped supermode optical fiber used for gain equalization, belonging to the fields of special optical fiber, optical fiber communication and signal processing. Background technique [0002] The development of modern information technology has promoted the comprehensive integration and penetration of technologies such as the Internet of Things, cloud computing, and artificial intelligence into various industries, resulting in a surge in network data traffic. However, optical fiber communication is the cornerstone of the data transmission bearer network. With the application of time division multiplexing, wavelength division multiplexing, polarization multiplexing and other technologies, due to nonlinear constraints, the capacity of single-mode optical fiber is close to Shannon's limit, making it difficult to improve. Laying a large number of single-mode optical fiber cables will bring volume consumption and to...

Claims

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Application Information

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IPC IPC(8): G02B6/02
CPCG02B6/02042G02B6/02114
Inventor 王建帅裴丽郑晶晶李祉祺赵琦徐琳宁提纲
Owner BEIJING JIAOTONG UNIV
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