Design of Ring-Core Few-Mode-EDFA With the Enhanced Saturation Input Signal Power and Low Differential Modal Gain

Fang, Yihong; Zeng, Yan; Qin, Yuwen; Xu, Ou; Li, Jianping; Fu, Songnian

doi:10.1109/jphot.2021.3095123

Cited by 18 publications

(8 citation statements)

References 32 publications

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“…OAM modes are subject to external environments in free space. Hence, different types of specialty fibers supporting OAM modes have been studied, including air-core fibers [9], ring-core fibers (RCFs) [10][11][12][13], photonic crystal fibers [14,15], and multi-mode fibers (MMFs) [16]. Remarkably, since the refractive-index distribution of the RCFs with a high refractive-index ring-core matches the intensity distribution of OAM modes, RCFs are mostly used to support the stable transmission of OAM modes.…”

Section: Introductionmentioning

confidence: 99%

The Performance of Orbital Angular Momentum Mode (|l| = 1~3) Amplification Based on Ring-Core Erbium-Doped Fibers

et al. 2022

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We demonstrated that a ring-core erbium-doped fiber amplifier (RC-EDFA) can support orbital angular momentum (OAM) modes with topological charges (|l| = 1~3). The dependence of the characteristics on the length of the RC-EDF was investigated experimentally, including an investigation of gain and 3 dB gain bandwidth over the whole C band (i.e., 1530~1565 nm). The 3 dB gain bandwidth was improved to 21 nm. At a signal wavelength of 1550 nm, the maximum gain of all signal modes was up to 30.1 dB. Differential modal gain was maintained below approximately 1.3 dB.

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Section: Introductionmentioning

confidence: 99%

The Performance of Orbital Angular Momentum Mode (|l| = 1~3) Amplification Based on Ring-Core Erbium-Doped Fibers

et al. 2022

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“…The signal rst enters the EDFA stage in the hybrid ampli er, and then it undergoes further ampli cation as it is fed into the cascaded EYDFA. EDFA is a vital ampli er widely used in optical communication networks, providing high gain, wide bandwidth, and low noise ampli cation for optical signals in the Cband [20]. Its exibility and effectiveness make it an integral component in building reliable and highcapacity ber-optic networks.…”

Section: Proposed Setupmentioning

confidence: 99%

Performance analysis of a hybrid optical amplifier based 480-Gbps DWDM-FSO system under the effect of different atmospheric conditions

Obaid,

Shahid,

Akram

et al. 2023

Preprint

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Free space optical (FSO) systems offer a desirable and affordable way of providing communication services in remote locations. They provide secure transmission without the requirement for licensing and with lower implementation costs. However, due to the impact of atmospheric turbulences on the effectiveness of FSO systems, their implementation faces significant challenges. Dense wavelength division multiplexing (DWDM) has shown promise in addressing the growing bandwidth needs in optical networks. This paper introduces a hybrid optical amplifier based system, combining DWDM and FSO technology. The proposed DWDM-FSO system operates at a rate of 480 Gbps and consists of 12 channels, each capable of transmitting data at 40 Gbps. The system’s performance is evaluated and compared by determining the Q-factor and bit error rate (BER) for both the cases when hybrid amplifier is employed and with no hybrid amplifier within the C-band, specifically focusing on wavelengths around 1550 nm. Moreover, the length of the FSO link is increased to assess the corresponding Q-factor and BER. Resultantly, the maximum distance for the FSO link is determined, ensuring that it remains within acceptable Q-factor and BER thresholds. Furthermore, the effectiveness of the FSO system is also evaluated and compared under different atmospheric conditions, considering both scenarios: when employing a hybrid amplifier and when not utilizing one.

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“…In past research, FM-EDFAs have been employed to realize mode gain equalization through the following three main strategies: changing the mode field intensity by designing a special refractive index profile, [12][13][14] managing the spatial distribution of the doped erbium ions, [15][16][17] and controlling the pump mode. [18][19][20][21] A lower differential mode gain (DMG) requires more complex pump mode superposition, a multilayer erbium doping distribution, or a special refractive index profile.…”

Section: Introductionmentioning

confidence: 99%

Mode-bases gain difference for Different phase profiles in Few-mode Erbium-doped Fiber Amplifiers

Zhang,

Gao,

et al. 2024

Preprint

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In few-mode erbium-doped fiber, which is key sections in space division multiplexing (SDM) communication system, linearly polarized (LP) and orbital angular momentum (OAM) mode as two groups of mode-bases with different phase profile can be transformed into each other for the fiber’s weakly guiding condition. In principle, the LPand OAM modes have different mode spatial intensity distribution and a gain difference for FM -EDF amplifier. How to analyze and characterize the differential mode-bases gain (DMBG) is important but still an issue. Here, we build for the first time a local analysis model composed of discrete elements of the FM-EDF cross-section in mode spatial intensity distribution azimuthal variations areas. Using the model during the two mode-bases, the description of local gain difference details and the analysis of local particle number distribution is realized, and the overall gain difference is obtained. By building the amplifier system based on mode phase profile controlling, the gain of two mode-bases is characterized experimentally. The measured DMBG is about 0.8dB in the second-order mode, which is consistent with the simulation result. This DMBG can be used to improve the performance of SDM communication system by switching the mode-bases with controlling the mode phase profile.

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Design of Ring-Core Few-Mode-EDFA With the Enhanced Saturation Input Signal Power and Low Differential Modal Gain

Cited by 18 publications

References 32 publications

The Performance of Orbital Angular Momentum Mode (|l| = 1~3) Amplification Based on Ring-Core Erbium-Doped Fibers

The Performance of Orbital Angular Momentum Mode (|l| = 1~3) Amplification Based on Ring-Core Erbium-Doped Fibers

Performance analysis of a hybrid optical amplifier based 480-Gbps DWDM-FSO system under the effect of different atmospheric conditions

Mode-bases gain difference for Different phase profiles in Few-mode Erbium-doped Fiber Amplifiers

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