DMD Reduction by Strong Mode Coupling in Few-mode Fibers Using Multi-laser Inscribed LPFGs

Wang, Xutao; Yang, Zhiqun; Yu, Wenbo; Liu, Yaping; Di, Zixiang; Li, Guifang; Zhang, Lin

doi:10.1364/cleo_si.2020.sth1l.2

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Implementation Of Strongly Coupled Fm-edfas1

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2022

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“…The feasibility of our proposed strongly coupled FM-EDFAs was also examined. Various fiber-type mode scramblers can be considered as a strong MC, but we particularly focused on the long-period gratings (LPGs) inscription technique during the fiber drawing process by CO 2 laser annealing [25,26] because it can provide highly controllable MC along the entire length of active fiber. According to [27], the grating angle Ψ 0 and grating strength ∆n g are the most essential parameters for LPG inscription and directly determine CS.…”

Section: Implementation Of Strongly Coupled Fm-edfasmentioning

confidence: 99%

Gain Equalization for Few-Mode Erbium-Doped Fiber Amplifiers via Strong Mode Coupling

et al. 2022

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Few-mode erbium-doped fiber amplifiers (FM-EDFAs) are one of the most important optical subsystems for successful space division multiplexed transmission systems. In this paper, we propose a new FM-EDFA designed to achieve significantly reduced differential modal gain (DMG) via strong mode coupling. Using a new numerical model based on a fiber transfer matrix, the DMGs of FM-EDFAs are systematically investigated and two different types of six-mode fiber amplifiers are analyzed, as exemplar demonstrations. In a uniformly doped step-index fiber, the DMG can be reduced from 9.3 to 1.1 dB (i.e., 8.2 dB reduction) and further reduced to 0.5 dB in a dual-layer doping structure.

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Section: Implementation Of Strongly Coupled Fm-edfasmentioning

confidence: 99%

Gain Equalization for Few-Mode Erbium-Doped Fiber Amplifiers via Strong Mode Coupling

et al. 2022

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DMD Reduction by Strong Mode Coupling in Few-mode Fibers Using Multi-laser Inscribed LPFGs

Abstract: We propose to use multiple lasers to write long-period gratings into few-mode fibers for significant reduction of the mean DMD by 280 times from 1700 to 6.2 ns at 1500 km.

Cited by 1 publication

References 6 publications

Gain Equalization for Few-Mode Erbium-Doped Fiber Amplifiers via Strong Mode Coupling

Gain Equalization for Few-Mode Erbium-Doped Fiber Amplifiers via Strong Mode Coupling

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