Multi-core fiber (MCF) transmission is a promising solution to support ever-increasing future traffic demands. Compared with uncoupled-core MCFs [1], the induced strong coupling in coupled-core (CC)-MCFs reduces the nonlinearity impact [2]. Transmission in these fibers leverages both spatial and wavelength division multiplexing and it has been experimentally tested mainly considering uniform quadrature amplitude modulation (QAM) formats [3]. Spectral efficiency can be further optimized by employing probabilistic shaping (PS) but the joint use of CC-MCF and PS has been rarely investigated [4]. In this paper, we present a transmission of PS signals through an infrastructure based on a CC-four core fiber (CC-4CF) deployed in the city of L'Aquila, Italy [5]. We ran experiments comparing the performance of standard polarization multiplexed 16QAM and PS-32QAM signals at a symbol rate of 30 GBaud: 800 Gbps net rate considering the spatial super-channel over four cores. We used the generalized mutual information (GMI) as performance metric and averaged over the 8 polarizations concidering the central channel. A realistic threshold (GMIth) of 3.6 bits/symbol (per spatial mode and polarization) has been set as a target: it is a typical value that guarantees post-FEC error-free transmission for most realistic SD-FEC.

Rate Optimized Probabilistic Shaping-Based Transmission Over Field Deployed Coupled-Core 4-Core-Fiber / Nespola, A.; Amirabadi, M. A.; Ryf, R.; Mazur, M.; Fontaine, N. K.; Dallachiesa, L.; Hayashi, T.; Kahaei, M. H.; Nezamalhosseini, S. A.; Marotta, A.; Mecozzi, A.; Antonelli, C.; Carena, A.. - ELETTRONICO. - (2023), pp. -1. (Intervento presentato al convegno 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) tenutosi a Munich, Germany nel 26-30 June 2023) [10.1109/CLEO/Europe-EQEC57999.2023.10231619].

Rate Optimized Probabilistic Shaping-Based Transmission Over Field Deployed Coupled-Core 4-Core-Fiber

Nespola, A.;Amirabadi, M. A.;Carena, A.
2023

Abstract

Multi-core fiber (MCF) transmission is a promising solution to support ever-increasing future traffic demands. Compared with uncoupled-core MCFs [1], the induced strong coupling in coupled-core (CC)-MCFs reduces the nonlinearity impact [2]. Transmission in these fibers leverages both spatial and wavelength division multiplexing and it has been experimentally tested mainly considering uniform quadrature amplitude modulation (QAM) formats [3]. Spectral efficiency can be further optimized by employing probabilistic shaping (PS) but the joint use of CC-MCF and PS has been rarely investigated [4]. In this paper, we present a transmission of PS signals through an infrastructure based on a CC-four core fiber (CC-4CF) deployed in the city of L'Aquila, Italy [5]. We ran experiments comparing the performance of standard polarization multiplexed 16QAM and PS-32QAM signals at a symbol rate of 30 GBaud: 800 Gbps net rate considering the spatial super-channel over four cores. We used the generalized mutual information (GMI) as performance metric and averaged over the 8 polarizations concidering the central channel. A realistic threshold (GMIth) of 3.6 bits/symbol (per spatial mode and polarization) has been set as a target: it is a typical value that guarantees post-FEC error-free transmission for most realistic SD-FEC.
2023
979-8-3503-4599-5
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2984850