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A few-mode erbium-doped fiber and a few-mode erbium-doped fiber amplifier

An erbium-doped fiber and amplifier technology, applied in the field of communication, can solve problems such as unconsidered mode crosstalk, and achieve the effect of flat gain and weakly coupled transmission

Active Publication Date: 2022-08-09
HUAWEI TECH CO LTD
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  • Summary
  • 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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  • A few-mode erbium-doped fiber and a few-mode erbium-doped fiber amplifier

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Embodiment Construction

[0029] Embodiments of the present application provide a few-mode erbium-doped fiber amplifier, which can achieve flat gain among transmission modes only by pumping a single fundamental mode, and simultaneously realize weakly coupled transmission of signal light in the few-mode erbium-doped fiber amplifier. Each of them will be described in detail below.

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0031] Different modes of light propagating in erbium-doped fibers have different light intensity dist...

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Abstract

The present application discloses a few-mode erbium-doped optical fiber. The core of the few-mode erbium-doped optical fiber includes a first layer, a second layer and a third layer from the inside to the outside, wherein the first layer is circular, and the second layer is circular. It is a first ring shape, the third layer is a second ring shape, the refractive index of the second layer is greater than the refractive index of the first layer and greater than the refractive index of the third layer, and the erbium ion doping concentration of the second layer is lower than that of the first layer. The ion doping concentration is smaller than the erbium ion doping concentration of the third layer. The solution provided by the present application can achieve flat gain between transmission modes only through single fundamental mode pumping, and at the same time realize weak coupling transmission of the signal to be amplified in the few-mode erbium-doped fiber.

Description

technical field [0001] The present application relates to the field of communication technologies, 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 continues to grow at an explosive rate, while traditional single-mode 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 space-division multiplexing method based on few-mode fiber has attracted extensive attention. It uses the independent orthogonal modes in the few-mode fiber as the transmission channel, which has been proved to effectively improve the capacity of the optical transmission system. At present, few-mode multiplexing systems are mainly divided into strong coupling and weak coup...

Claims

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Application Information

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Patent Type & Authority Patents(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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