Multimode fiber amplifier with tunable modal gain using a reconfigurable multimode pump

Bai, Neng; Ip, Ezra; Wang, Ting; Li, Guifang

doi:10.1109/pho.2011.6110685

Cited by 32 publications

(44 citation statements)

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“…[6]. For the calculation of gain, the input signal power in each orientation and polarization of signal mode groups has been chosen as 30 µW and erbium ion concentration used is N 0 =110 25 m -3 .…”

Section: Numerical Simulation and Resultsmentioning

confidence: 99%

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Design and Analysis of Annulus Core Few Mode EDFA for Modal Gain Equalization

Gaur

Rastogi

2016

IEEE Photon. Technol. Lett.

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Abstract-Few-mode fiber amplifier is widely under study to overcome the issue of internet traffic in optical communication. This article proposes annulus core few-mode erbium doped fiber (FM-EDF) with annulus or extra annulus doping for amplification of the LP 01 , LP 11 , LP 21 , and LP 31 signal mode groups with low differential modal gain (DMG). Our simulations confirm that extra annulus doping helps in reducing DMG of higher order mode groups. We have achieved less than 2.2 dB DMG over Cband for 4-mode groups using extra annulus doping. The proposed EDF would be useful for space division multiplexing (SDM) based optical fiber communication system.

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Section: Numerical Simulation and Resultsmentioning

confidence: 99%

“…A system of multimode pump configuration has been demonstrated for controlled mode dependent gain at 1530 nm with DMG less than ±0.5 dB for two mode groups using uniformly-doped FM-EDF [6]. Several FM-EDFs using various controlled erbium doping profiles have been proposed.…”

mentioning

confidence: 99%

Design and Analysis of Annulus Core Few Mode EDFA for Modal Gain Equalization

Gaur

Rastogi

2016

IEEE Photon. Technol. Lett.

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“…The derivation of our figure of merit starts by the rate equations, defined in [14] for the two-level system. As a result of above simplifications, those equations are rewritten as: In order to complete the model for the FM-EDFA, while simultaneously taking into account the simplifications proposed in this section, the input signal propagating equations defined in [14] are rewritten as…”

Section: Optimization Formalism and Methodologymentioning

confidence: 99%

EDFA Design and Analysis for WDM Optical Systems Based on Modal Multiplexing

Herbster

Romero

2017

J. Microw. Optoelectron. Electromagn. Appl.

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“…al. 30 proposed a scheme to control the MDG in a FMF based Erbium doped fiber amplifier (EDFA) and experimental investigations have recently followed 13,31 with mixed results. In this work we present optical amplification based on the Raman effect 32 in FMF, where the MDG was experimentally reduced to < 0.5 dB.…”

Section: Raman Amplification In Few-mode Fibermentioning

confidence: 99%

Space-division multiplexed transmission over few-mode- and coupled-core fiber based on coherent MIMO digital signal processing

Ryf¹,

Randel²,

Essiambre³

et al. 2012

SPIE Proceedings

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The capacity of optical transmission systems has increased dramatically since their first deployments in the mid 1970s . However, studies show that the theoretical capacity limit of single-mode fiber is about to be reached, and space-division multiplexing has been proposed to overcome this limit. With the high levels of integration needed for economic deployment, space-division multiplexing may exhibit large crosstalk between the supported fiber modes. We propose to use coherent multiple-input multiple-output (MIMO) digital signal processing (DSP), a technique widely used in wireless communication, to compensate crosstalk present in spatial multiplexing over fibers. According to MIMO theory, crosstalk in multi-mode transmission systems can be completely reversed if the crosstalk is described by a unitary transformation. For optical fibers this is fulfilled if all available fiber modes can be selectively excited and if all the modes are coherently detected at the end of the fiber, provided that mode-dependent loss is negligible. We successfully applied the technique to demonstrate the transmission of six independent mode-multiplexed 20-Gbaud QPSK signals over a single, optically amplified span of 137-km few-mode fiber (FMF). Further, in a multi-span experiment, we reach 1200 km by transmitting over a 3-core coupled-core fiber (CCF). Details for both experiments will be presented, including the description of the supported polarization-and spatial modes of the fiber, the mode multiplexers used to launch and detect the modes, and the MIMO DSP algorithm used to recover the channels.

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Multimode fiber amplifier with tunable modal gain using a reconfigurable multimode pump

Cited by 32 publications

References 0 publications

Design and Analysis of Annulus Core Few Mode EDFA for Modal Gain Equalization

Design and Analysis of Annulus Core Few Mode EDFA for Modal Gain Equalization

EDFA Design and Analysis for WDM Optical Systems Based on Modal Multiplexing

Space-division multiplexed transmission over few-mode- and coupled-core fiber based on coherent MIMO digital signal processing

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