Zobrazeno 1 - 10
of 532
pro vyhledávání: '"Ferreira , Filipe"'
Programmable optical devices provide performance enhancement and flexibility to spatial multiplexing systems enabling transmission of tributaries in high-order eigenmodes of spatially-diverse transmission media, like multimode fiber (MMF). Wavefront
Externí odkaz:
http://arxiv.org/abs/2410.23369
We derive novel approximate closed-form expressions for the nonlinear coupling coefficients appearing in the Manakov equations for multimode fibers for space-division multiplexing in the two regimes of strong and weak coupling. The expressions depend
Externí odkaz:
http://arxiv.org/abs/2404.13128
Autor:
Jarmolovičius, Mindaugas, Semrau, Daniel, Buglia, Henrique, Shevchenko, Mykyta, Ferreira, Filipe M., Sillekens, Eric, Bayvel, Polina, Killey, Robert I.
We model the transmission of ultrawideband signals, including wavelength-dependent fibre parameters: dispersion, nonlinear coefficient and effective fibre core area. To that end, the inter-channel stimulated Raman scattering Gaussian noise integral m
Externí odkaz:
http://arxiv.org/abs/2401.18022
Autor:
Ferreira, Filipe M., Barbosa, Fabio A.
We report on the design of multimode-mode fibres guiding up to 870 spatial and polarization modes for low differential mode delay over the C-band.
Comment: Submitted to 2022 European Conference on Optical Communications (ECOC)
Comment: Submitted to 2022 European Conference on Optical Communications (ECOC)
Externí odkaz:
http://arxiv.org/abs/2206.09855
A novel MIMO-DSP for space-division multiplexing over multimode fibres is proposed. A principal modes approach is shown to provide two-fold benefits: over 13 times channel memory reduction while minimising the number of optical front-ends needed to d
Externí odkaz:
http://arxiv.org/abs/2206.09846
Autor:
Ferreira-Filipe, Diogo A., Oliveira, Leila, Paço, Ana, Fernandes, António J.S., Costa, Florinda M., Duarte, Armando C., Rocha-Santos, Teresa, Patrício Silva, Ana L.
Publikováno v:
In Science of the Total Environment 20 July 2024 935
Autor:
Ferreira-Filipe, Diogo A., Paço, Ana, Pinho, Bruna, Silva, Rafael, Silva, Sara A.M., Jesus, Fátima, Pereira, Joana L., Duarte, Armando C., Rocha-Santos, Teresa A.P., Patrício-Silva, Ana L.
Publikováno v:
In Science of the Total Environment 20 February 2024 912
We report the discovery of 34 new open clusters and candidates as a result of a systematic search carried out in 200 adjacent fields of 1x1 square degrees area projected towards the Galactic bulge, using Gaia DR2 data. The objects were identified and
Externí odkaz:
http://arxiv.org/abs/2101.10982
We report the discovery of 25 new open clusters resulting from a search in dense low galactic latitude fields. We also provide, for the first time, structural and astrophysical parameters for the new findings and 34 other recently discovered open clu
Externí odkaz:
http://arxiv.org/abs/2006.05611
Autor:
Karanov, Boris, Chagnon, Mathieu, Aref, Vahid, Ferreira, Filipe, Lavery, Domanic, Bayvel, Polina, Schmalen, Laurent
We investigate methods for experimental performance enhancement of auto-encoders based on a recurrent neural network (RNN) for communication over dispersive nonlinear channels. In particular, our focus is on the recently proposed sliding window bidir
Externí odkaz:
http://arxiv.org/abs/2005.08790