基于两层环芯掺铒光纤的高增益低dmg模式放大特性

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-04-15 DOI:10.1016/j.yofte.2025.104240

Renli Xiong, Wei Chen, Fei Wang, Yanhua Luo, Yi Huang, Jianxiang Wen, Fufei Pang, Tingyun Wang

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引用次数: 0

摘要

本文提出了一种具有两层掺铒结构的环芯掺铒光纤（RC-EDF），制备了具有大模间传播常数差的少模光纤。模式组间最小有效指数差异大于8 × 10−4。新型光纤中LP01、LP11和LP21的重叠积分差与阶跃指数均匀掺少模掺铒光纤（FM-EDF）相比显著降低了91.85%。实验表明，LP01、LP11和LP21在1550 nm波长处的模态增益均大于28 dB，差模态增益（DMG）仅为0.45 dB。环形核心折射率结构和两层铒掺杂技术为模式增益均衡提供了指导。所提出的RC-EDF有利于抑制模间耦合的模复用系统的实际应用。

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High-gain and low-DMG mode amplification characteristics based on two-layer ring-core erbium-doped fiber

In this paper, we proposed a ring-core erbium-doped fiber (RC-EDF) with a two-layer erbium doping profile, a few-mode fiber with a large inter-mode propagation constant difference was fabricated. The minimum effective index difference between mode groups was larger than 8 × 10⁻⁴. The overlap integral difference of LP₀₁, LP₁₁ and LP₂₁ in the novel fiber was remarkably decreased by 91.85 % compared with step-index uniformly doped few-mode erbium-doped fiber (FM-EDF). Experiments demonstrated that the modal gains of LP₀₁, LP₁₁ and LP₂₁ were higher than 28 dB and the differential modal gain (DMG) was only 0.45 dB at the wavelength of 1550 nm. The ring-core refractive index structure and two-layer erbium doping technique provide a guidance for mode gain equalization. The proposed RC-EDF is beneficial for the practical applications of a mode multiplexed system with suppressed inter-mode coupling.

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.