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82 results on '"Galdino, L."'

1. A Modulation-Format Dependent Closed-form Expression for the Gaussian Noise Model in the Presence of Raman Amplification

Author

Buglia, H., Jarmolovicius, M., Galdino, L., Killey, R. I., and Bayvel, P.

Subjects
Electrical Engineering and Systems Science - Signal Processing
Abstract

A closed-form expression that estimates the nonlinear interference of arbitrary modulation formats in Raman amplified links is presented. Accounting for any pumping schemes and inter-channel stimulated Raman scattering effect, the formula is applied to an optical bandwidth of 20~THz and validated using numerical simulations., Comment: To be presented at European Conference on Optical Communications (ECOC) 2023

Published
2023

2. A Closed-form Expression for the Gaussian Noise Model in the Presence of Raman Amplification

Author

Buglia, H., Jarmolovicius, M., Galdino, L., Killey, R. I., and Bayvel, P.

Subjects
Electrical Engineering and Systems Science - Signal Processing
Abstract

A closed-form model for the nonlinear interference (NLI) in Raman amplified links is presented, the formula accounts for both forward (FW) and backward (BW) pumping schemes and inter-channel stimulated Raman scattering (ISRS) effect. The formula also accounts for an arbitrary number of pumps, wavelength-dependent fibre parameters, launch-power profiles, and is tested over a distributed Raman-amplified system setup. The formula is suitable for ultra-wideband (UWB) optical transmission systems and is applied in a signal with 13~THz optical bandwidth corresponding to transmission over the S-, C-, and L- band. The accuracy of the closed-form formula is validated through comparison with numerical integration of the Gaussian noise (GN) model and split-step Fourier method (SSFM) simulations in a point-to-point transmission link., Comment: arXiv admin note: text overlap with arXiv:2210.09067

Published
2023

3. A Closed-form Expression for the ISRS GN Model Supporting Distributed Raman Amplification

Author

Buglia, H., Jarmolovicius, M., Vasylchenkova, A., Sillekens, E., Killey, R. I., Bayvel, P., and Galdino, L.

Subjects
Electrical Engineering and Systems Science - Signal Processing
Abstract

A closed-form model for the nonlinear interference in distributed Raman amplified links is presented, the formula accounts for both forward and backward pumping.

Published
2022

4. Immediate Cortical and Spinal C-Fos Immunoreactivity After ICMS of the Primary Somatosensory Cortex in Rats

Author

Costa, V. S., Suassuna, A. O. B, Galdino, L., Kunicki, A. C., Magjarevic, Ratko, Series Editor, Ładyżyński, Piotr, Associate Editor, Ibrahim, Fatimah, Associate Editor, Lackovic, Igor, Associate Editor, Rock, Emilio Sacristan, Associate Editor, Bastos-Filho, Teodiano Freire, editor, de Oliveira Caldeira, Eliete Maria, editor, and Frizera-Neto, Anselmo, editor

Published
2022
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5. A Single Administration of GBR 12909 Alters Basal Mesocorticolimbic Activity

Author

Galdino, L., Kunicki, A. C., Filho, L. C. N., Moioli, R. C., Araújo, M. F. P., Magjarevic, Ratko, Series Editor, Ładyżyński, Piotr, Associate Editor, Ibrahim, Fatimah, Associate Editor, Lackovic, Igor, Associate Editor, Rock, Emilio Sacristan, Associate Editor, Bastos-Filho, Teodiano Freire, editor, de Oliveira Caldeira, Eliete Maria, editor, and Frizera-Neto, Anselmo, editor

Published
2022
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14. 0.596 Pb/s S, C, L-band transmission in a 125µm diameter 4-core fiber using a single wideband comb source

Author

Puttnam, B. J., Luís, R. S., Rademacher, G., Galdino, L., Lavery, D., Eriksson, Tobias A., Awaji, Y., Furukawa, H., Bayvel, P., Wada, N., Puttnam, B. J., Luís, R. S., Rademacher, G., Galdino, L., Lavery, D., Eriksson, Tobias A., Awaji, Y., Furukawa, H., Bayvel, P., and Wada, N.

Abstract

We demonstrate 596.4 Tb/s over a standard cladding diameter fiber with 4 single-mode cores, using a single wideband optical comb source to provide 25 GHz spaced carriers over 120 nm range across S, C and L bands. OFC 2020, QC 20201112

Published
2020
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15. Improved Power Budget of 112 Gb/s/l Intra-Datacentre Links Using a Split-Carrier Transmitter Architecture

Author

Gerard, T., Liu, Z., Erkilinc, M.S., Galdino, L., Bayvel, P., Thomsen, B., Lavery, D., and Publica

Abstract

A split-carrier transmitter is proposed to improve loss budget for short distance 100 G-per-wavelength intra-datacentre links. By applying a low-complexity hardware modification to the transmitter, the proposed architecture reduces transmitter loss without sacrificing modulation quality. These benefits are demonstrated by implementing intensity modulated, direct-detection signals using a single-ended photodiode receiver. The architecture is evaluated using two formats: Nyquist-shaped 56 GBd PAM-4 and Nyquist-shaped double sideband 28 GBd 16-QAM. The results are compared against a conventional transmitter modulated with Nyquist-shaped 56 GBd PAM-4. Through simulation, the split-carrier transmitter is shown to achieve hard decision forward error correction ready performance after 2 km of transmission using a laser output power of just 0 dBm; a 5.2 dB improvement over the conventional transmitter.

Published
2019

22. DSP for Single-sideband Direct-detection Systems

Author

Li, Z., primary, Erkılınç, M.S., additional, Shi, K., additional, Sillekens, E., additional, Galdino, L., additional, Xu, T., additional, Thomsen, B.C., additional, Bayvel, P., additional, and Killey, R.I., additional

Published
2018
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28. Optical Phase Conjugation in Installed Optical Networks

Author

Saavedra, G., primary, Sun, Y., additional, Bottrill, K. R. H., additional, Galdino, L., additional, Parmigiani, F., additional, Liu, Z., additional, Richardson, D. J., additional, Petropoulos, P., additional, Killey, R. I., additional, and Bayvel, P., additional

Published
2018
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32. Experimental Investigation of Nonlinear Signal Distortions in Ultra-Wideband Transmission Systems

Author

Saavedra, G., primary, Tan, M., additional, Elson, D. J., additional, Galdino, L., additional, Semrau, D., additional, Iqbal, Md. A., additional, Phillips, I.D., additional, Harper, P., additional, Mac Suibhne, N., additional, Ellis, A. D., additional, Lavery, D., additional, Thomsen, B. C., additional, Killey, R. I., additional, and Bayvel, P., additional

Published
2017
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35. Amplification schemes and multi-channel DBP for unrepeatered transmission

Author

European Commission, Galdino, L., Tan, Mingming, Alvarado, Alex, Lavery, D., Rosa, Pawel, Maher, R., Ania Castañón, Juan Diego, Harper, P., Makovejs, S., Thomsen, B.C., Bayvel, P., European Commission, Galdino, L., Tan, Mingming, Alvarado, Alex, Lavery, D., Rosa, Pawel, Maher, R., Ania Castañón, Juan Diego, Harper, P., Makovejs, S., Thomsen, B.C., and Bayvel, P.

Abstract

The performance of unrepeatered transmission of a seven Nyquist-spaced 10 GBd PDM-16QAM superchannel using full signal band coherent detection and multi-channel digital back propagation (MC-DBP) to mitigate nonlinear effects is analysed. For the first time in unrepeatered transmission, the performance of two amplification systems is investigated and directly compared in terms of achievable information rates (AIRs): 1) erbium-doped fibre amplifier (EDFA) and 2) second-order bidirectional Raman pumped amplification. The experiment is performed over different span lengths, demonstrating that, for an AIR of 6.8 bit/s/Hz, the Raman system enables an increase of 93 km (36 %) in span length. Further, at these distances, MC-DBP gives an improvement in AIR of 1 bit/s/Hz (to 7.8 bit/s/Hz) for both amplification schemes. The theoretical AIR gains for Raman and MC-DBP are shown to be preserved when considering low-density parity-check codes. Additionally, MC-DBP algorithms for both amplification schemes are compared in terms of performance and computational complexity. It is shown that to achieve the maximum MC-DBP gain, the Raman system requires approximately four times the computational complexity due to the distributed impact of fibre nonlinearity.

Published
2016

38. Spectrally shaped DP-16QAM super-channel transmission with multi-channel digital back-propagation

Author

Maher, R., Xu, T., Galdino, L., Sato, M., Alvarado, A., Shi, K., Savory, S.J., Thomsen, B.C., Killey, R.I., Bayvel, P., Maher, R., Xu, T., Galdino, L., Sato, M., Alvarado, A., Shi, K., Savory, S.J., Thomsen, B.C., Killey, R.I., and Bayvel, P.

Abstract

The achievable transmission capacity of conventional optical fibre communication systems is limited by nonlinear distortions due to the Kerr effect and the difficulty in modulating the optical field to effectively use the available fibre bandwidth. In order to achieve a high information spectral density (ISD), while simultaneously maintaining transmission reach, multi-channel fibre nonlinearity compensation and spectrally efficient data encoding must be utilised. In this work, we use a single coherent super-receiver to simultaneously receive a DP-16QAM super-channel, consisting of seven spectrally shaped 10GBd sub-carriers spaced at the Nyquist frequency. Effective nonlinearity mitigation is achieved using multi-channel digital back-propagation (MC-DBP) and this technique is combined with an optimised forward error correction implementation to demonstrate a record gain in transmission reach of 85%; increasing the maximum transmission distance from 3190 km to 5890 km, with an ISD of 6.60 b/s/Hz. In addition, this report outlines for the first time, the sensitivity of MC-DBP gain to linear transmission line impairments and defines a trade-off between performance and complexity.

Published
2015

39. Unrepeatered Nyquist PDM-16QAM transmission over 364 km using Raman amplification and multi-channel digital back-propagation

Author

Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Engineering and Physical Sciences Research Council (UK), Galdino, L., Tan, Mingming, Lavery, D., Rosa, Pawel, Maher, R., Phillips, I.D., Ania Castañón, Juan Diego, Harper, P., Killey, R.I., Thomsen, B.C., Makovejs, S., Bayvel, P., Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Engineering and Physical Sciences Research Council (UK), Galdino, L., Tan, Mingming, Lavery, D., Rosa, Pawel, Maher, R., Phillips, I.D., Ania Castañón, Juan Diego, Harper, P., Killey, R.I., Thomsen, B.C., Makovejs, S., and Bayvel, P.

Abstract

© 2015 Optical Society of America. Transmission of a net 467-Gb/s PDM-16QAM Nyquistspaced superchannel is reported with an intra-superchannel net spectral efficiency (SE) of 6.6 (b/s)/Hz, over 364-km SMF-28 ULL ultra-low loss optical fiber, enabled by bidirectional second-order Raman amplification and digital nonlinearity compensation. Multi-channel digital backpropagation (MC-DBP) was applied to compensate for nonlinear interference; an improvement of 2 dB in Q2 factor was achieved when 70-GHz DBP bandwidth was applied, allowing an increase in span length of 37 km.

Published
2015

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