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Design and optimization of submarine optical links using space-division multiplexing

Grant number: 18/14026-5
Support type:Scholarships abroad - Research
Effective date (Start): January 31, 2019
Effective date (End): January 21, 2020
Field of knowledge:Engineering - Electrical Engineering - Telecommunications
Principal researcher:Darli Augusto de Arruda Mello
Grantee:Darli Augusto de Arruda Mello
Host: Joseph Mardell Kahn
Home Institution: Faculdade de Engenharia Elétrica e de Computação (FEEC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Research place: Stanford University, United States  
Associated research grant:15/24341-7 - New strategies to confront with the threat of capacity exhaustion, AP.TEM


Submarine fiber systems carry nearly 95% of the data traffic between different countries and continents. These systems use space-division multiplexing (SDM), which is currently implemented by several single-mode fibers in parallel. To increase the spatial information density and enable compact scaling of components, multi-core and multi-mode fibers are interesting alternatives for the future. In long-haul systems, typically the bit rate is limited by amplified spontaneous emission (ASE) noise at low power levels, and by fiber nonlinear interference (NLI) at high power levels. Bit rate limitations due to these two effects have been extensively studied, and optimal operating regimes have been identified. On the other hand, further limitations arisein modern submarine systems, as a large number of spatial channels are required to maximizethe bit rate subject to power feed equipment (PFE) constraints. The most critical element ofsubmarine links are optical amplifiers, which compensate for optical signal losses during fiber propagation. In submarine systems subject to PFE limitations, the energy conversion efficiency between the electrical power supply of the amplifier and its resulting optical power is a key parameter for the calculation of the link capacity. A low conversion efficiency may drive optical amplifiers with insufficient electrical power to achieve the maximum system capacity. Thus, this project aims to investigate power-efficient optical amplification architectures for submarinelinks with SDM, and quantify their impact on the link capacity. Amplifier architectures based on multicore and/or multimode fibers will be analyzed by simulation, and their impact on the system performance will be evaluated using information-theoretical parameters. Finally, this project strengthens the cooperation between the groups of Prof. Joseph M. Kahn at Stanford University and Prof. Darli Mello at Unicamp, and adds advanced knowledge to two ongoing FAPESP thematic projects in which the proponent participates. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
OSPINA, RUBY S. B.; VAN DEN HOUT, MENNO; ALVARADO-ZACARIAS, JUAN CARLOS; ANTONIO-LOPEZ, JOSE ENRIQUE; BIGOT-ASTRUC, MARIANNE; CORREA, ADRIAN AMEZCUA; SILLARD, PIERRE; AMEZCUA-CORREA, RODRIGO; OKONKWO, CHIGO; MELLO, DARLI A. A. Mode-Dependent Loss and Gain Estimation in SDM Transmission Based on MMSE Equalizers. Journal of Lightwave Technology, v. 39, n. 7, p. 1968-1975, APR 1 2021. Web of Science Citations: 0.
BARBOSA, FABIO APARECIDO; ROSSI, SANDRO M.; MELLO, DARLI A. A. Phase and Frequency Recovery Algorithms for Probabilistically Shaped Transmission. Journal of Lightwave Technology, v. 38, n. 7, p. 1827-1835, APR 1 2020. Web of Science Citations: 0.
MELLO, DARLI A. A.; SRINIVAS, HRISHIKESH; CHOUTAGUNTA, KARTHIK; KAHN, JOSEPH M. Impact of Polarization- and Mode-Dependent Gain on the Capacity of Ultra-Long-Haul Systems. Journal of Lightwave Technology, v. 38, n. 2, p. 303-318, JAN 15 2020. Web of Science Citations: 0.

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