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Few-mode erbium-doped optical fiber and few-mode erbium-doped optical fiber amplifier

An erbium-doped optical fiber and amplifier technology, which is applied in the field of communication, can solve problems such as mode crosstalk without consideration, and achieve the effect of flat gain and weak coupling transmission

Active Publication Date: 2021-03-16
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, related studies mainly focus on equalizing the gain among different modes, without considering the problem of mode crosstalk

Method used

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  • Few-mode erbium-doped optical fiber and few-mode erbium-doped optical fiber amplifier

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Embodiment Construction

[0029] The embodiment of the present application provides a few-mode erbium-doped fiber amplifier, which can achieve gain flatness between transmission modes only through single fundamental mode pumping, and at the same time realize weak coupling transmission of signal light in the few-mode erbium-doped fiber amplifier. Each will be described in detail below.

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0031] Different modes of light propagating in erbium-doped fibers have different light intensity distributions. Therefore, when using ...

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Abstract

The invention discloses a few-mode erbium-doped optical fiber. A fiber core of the few-mode erbium-doped optical fiber comprises a first layer, a second layer and a third layer from inside to outside,the first layer is round, the second layer is in a first annular shape, the third layer is in a second annular shape, and the refractive index of the second layer is larger than the refractive indexof the first layer and larger than the refractive index of the third layer. The erbium ion doping concentration of the second layer is less than the erbium ion doping concentration of the first layerand less than the erbium ion doping concentration of the third layer. According to the scheme provided by the invention, gain flatness among transmission modes can be realized only through single-fundamental-mode pumping, and weak coupling transmission of a to-be-amplified signal in the few-mode erbium-doped fiber is realized at the same time.

Description

technical field [0001] The present application relates to the technical field of communication, in particular to a few-mode erbium-doped optical fiber. Background technique [0002] With the rapid development of new services such as ultra-high-definition video and cloud computing, the demand for information transmission bandwidth is increasing at an explosive rate, and the traditional single-mode optical fiber transmission has approached the theoretical transmission limit of 100Tbit / s. Therefore, it is urgent to study new technology to further enhance the optical transmission capacity. In recent years, a new type of space division multiplexing based on few-mode fibers has received widespread attention. It uses independent orthogonal modes in few-mode fibers as transmission channels, and has been proven to effectively increase the capacity of optical transmission systems. At present, few-mode multiplexing systems are mainly divided into strong coupling and weak coupling tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/23
CPCH01S3/06754H01S3/06716H01S3/06708H01S3/2316
Inventor 喻寒琛殷祥郭强李巨浩朱景龙陈章渊
Owner HUAWEI TECH CO LTD
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