Sub-cycle QAM modulation for VCSEL-based optical fiber links.
Opt Express
; 21(2): 1830-9, 2013 Jan 28.
Article
em En
| MEDLINE
| ID: mdl-23389167
ABSTRACT
QAM modulation utilizing subcarrier frequency lower than the symbol rate is both theoretically and experimentally investigated. High spectral efficiency and concentration of power in low frequencies make sub-cycle QAM signals attractive for optical fiber links with direct modulated light sources. Real-time generated 10-Gbps 4-level QAM signal in a 7.5-GHz bandwidth utilizing subcarrier frequency at a half symbol rate was successfully transmitted over 20-km SMF using an un-cooled 1.5-µm VCSEL. Only 2.5-dB fiber transmission power penalty was observed with no equalization applied.
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Base de dados:
MEDLINE
Assunto principal:
Telecomunicações
/
Redes de Comunicação de Computadores
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Processamento de Sinais Assistido por Computador
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Tecnologia de Fibra Óptica
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article