Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Luis H. H. Carvalho"'
Autor:
Giovanni B. de Farias, Julio C. R. F. Oliveira, Leandro Matiolli, Juliano R. F. Oliveira, Flávio Borin, Luis H. H. Carvalho
Publikováno v:
2019 SBFoton International Optics and Photonics Conference (SBFoton IOPC).
In this work, an overview of requirements for compact optical modules and devices is presented, focusing on optical laser sources. Regarding coherent applications, the laser must have narrow linewidth, while, at the same time, be compact and present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c90e7046be5e0502e1e7aa32050e0dd
https://doi.org/10.1109/sbfoton-iopc.2019.8910265
https://doi.org/10.1109/sbfoton-iopc.2019.8910265
Autor:
Grasso Giorgio, Luis H. H. Carvalho, Lucia Ferrario, Righetti Aldo, Maria Chiara Ubaldi, Giovanni B. de Farias, Fausto Meli, Hening A. de Andrade, Leandro T. Zanvettor
Publikováno v:
2018 SBFoton International Optics and Photonics Conference (SBFoton IOPC).
In this paper, the design methodology and main experimental results of an External Cavity Laser (ECL) with narrow linewidth ( 16 dBm) and potential to achieve 40 nm tunability in C-band. System performance of 16-Quadrature Amplitude Modulation (QAM)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe911b91c3e7b026748e8aa213a2ccfe
https://doi.org/10.1109/sbfoton-iopc.2018.8610900
https://doi.org/10.1109/sbfoton-iopc.2018.8610900
Autor:
Neil Guerrero Gonzalez, Andy Doberstein, Júlio César Medeiros Diniz, Darko Zibar, Idelfonso Tafur Monroy, Jose Estaran, Carolina Franciscangelis, Julio C. R. F. Oliveira, Hansjoerg Haisch, Bernd Nebendahl, Molly Piels, Luis H. H. Carvalho
Publikováno v:
Journal of Lightwave Technology. 33:1333-1343
In this paper, tools from machine learning community, such as Bayesian filtering and expectation maximization parameter estimation, are presented and employed for laser amplitude and phase noise characterization. We show that phase noise estimation b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f58e35e918b7606dd52d14d28cdff84f
https://doi.org/10.1109/jlt.2015.2394808
https://doi.org/10.1109/jlt.2015.2394808
Autor:
Stenio M. Ranzini, Luis H. H. Carvalho, Andre L. N. Souza, Andrea Chiuchiarelli, Jacklyn D. Reis, Rafael C. Figueiredo
Publikováno v:
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC).
We investigate some key requirements for PAM4 operation at 56 Gbaud focusing on short-reach intra-data center interconnect. We report simulated results of bandwidth limitations for transmitter and receiver sides components with and without pulse shap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc4a42fbfdf8b19a14652116c4554014
https://doi.org/10.1109/imoc.2017.8121057
https://doi.org/10.1109/imoc.2017.8121057
Autor:
Yesica R. R. Buscamante, Alexandre P. Freitas, Henrique F. Santana, Andrea Chiuchiarelli, Giovanni B. de Farias, Jacklyn D. Reis, Diogo A. Motta, Uiara Celine de Moura, Luis H. H. Carvalho
Publikováno v:
Next-Generation Optical Networks for Data Centers and Short-Reach Links IV.
Emerging short-reach data center interconnect (typically in the range of tens of km) is a scenario wherein the capacity has to be maximized over point-to-point optical links without intermediate optical amplification, i.e. unrepeated links. For this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f16c825dd87934e0c7d316a0607acb9e
https://doi.org/10.1117/12.2256124
https://doi.org/10.1117/12.2256124
Autor:
Andrea Chiuchiarelli, Luis H. H. Carvalho, Rohan Gandhi, Jacklyn D. Reis, Francesco Caggioni, Julio C. R. F. Oliveira, Sandro M. Rossi
Publikováno v:
OFC
The first demonstration of real-time 53.125-GBd PAM-4 optical transmission over 2-km SSMF enabled by 16-nm DSP-ASIC and small-size, high-bandwidth optoelectronics is reported. Pre-FEC BER
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e225fe4767c5c119656ac2c3c4f3c020
https://doi.org/10.1364/ofc.2017.w4i.2
https://doi.org/10.1364/ofc.2017.w4i.2
Autor:
Mikkel N. Schmidt, Carolina Franciscangelis, Luis H. H. Carvalho, Vitor Ribeiro, Edson Porto da Silva, Jose Estaran, Julio C. R. F. Oliveira, Ole Winther, Robert Borkowski, Darko Zibar, Idelfonso Tafur Monroy
Publikováno v:
Journal of Lightwave Technology. 32:1608-1615
In this paper, joint estimation of carrier frequency, phase, signal means and noise variance, in a maximum likelihood sense, is performed iteratively by employing expectation maximization. The parameter estimation is soft decision driven and allows j
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10b9c103983842c8028d7a1726046bf9
https://doi.org/10.1109/jlt.2014.2308636
https://doi.org/10.1109/jlt.2014.2308636
Autor:
Darko Zibar, Idelfonso Tafur Monroy, Robert Borkowski, Edson Porto da Silva, Julio C. R. F. Oliveira, Luis H. H. Carvalho, Júlio César Medeiros Diniz
Publikováno v:
Borkowski, R, de Carvalho, L H H, Silva, E P D, Diniz, J C M, Zibar, D, de Oliveira, J C R F & Tafur Monroy, I 2014, ' Experimental evaluation of prefiltering for 56 Gbaud DP-QPSK signal transmission in 75 GHz WDM grid ', Optical Fiber Technology, vol. 20, no. 1, pp. 39-43 . https://doi.org/10.1016/j.yofte.2013.11.006
We investigate optical prefiltering for 56 Gbaud (224 Gbit/s) electrical time-division multiplexed (ETDM) dual polarization (DP) quaternary phase shift keying (QPSK) transmission. Different transmitter-side optical filter shapes are tested and their
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a19a54025e8cead113d0e759072200c
Autor:
Julio C. R. F. Oliveira, Fábio Donati Simões, Mônica de Lacerda Rocha, Daniel Moutinho Pataca, Cristiane Adami, Luis H. H. Carvalho
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Volume: 12, Issue: 2, Pages: 524-532, Published: DEC 2013
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 12, Iss 2, Pp 524-532
Journal of Microwaves, Optoelectronics and Electromagnetic Applications v.12 n.2 2013
Journal of Microwaves. Optoelectronics and Electromagnetic Applications
Sociedade Brasileira de Microondas e Optoeletrônica (SBMO)
instacron:SBMO
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 12, Iss 2, Pp 524-532
Journal of Microwaves, Optoelectronics and Electromagnetic Applications v.12 n.2 2013
Journal of Microwaves. Optoelectronics and Electromagnetic Applications
Sociedade Brasileira de Microondas e Optoeletrônica (SBMO)
instacron:SBMO
This paper describes the transmission of a non-guard interval 1.12 Tb/s 10-carrier superchannel, launched into a 226 km recirculating loop. After two round trips (452 km) a BER below the FEC limit (3.8 x 10-3) was still obtained. To evaluate the supe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2addf2b3b1c17540338117549f96b93e
https://doi.org/10.1590/s2179-10742013000200021
https://doi.org/10.1590/s2179-10742013000200021
Autor:
Luis H. H. Carvalho, E.P.L. Filho, Fábio Donati Simões, Victor E. Parahyba, Juliano R. F. Oliveira, Eduardo O. Schneider, Stenio M. Ranzini, Júlio César Medeiros Diniz, Julio C. R. F. Oliveira, Jacklyn D. Reis, Eduardo De Souza Rosa
Publikováno v:
Electronics Letters. 51:1094-1096
The trade-off between transmission performance and hardware implementation in application-specific integrated circuits of digital backpropagation (DBP) in coherent 32 GBd polarisation-division multiplexing 16 quadrature amplitude modulation is analys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83533cea31f3f8aa0066562ad351945a
https://doi.org/10.1049/el.2015.0576
https://doi.org/10.1049/el.2015.0576