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https://hdl.handle.net/10316/102706
Title: | Investigation of wired and wireless services based on OFDM DSB-RC transmission in the presence of modulation chirp of a DEMZM | Authors: | Almeida, Paulo Silva, Henrique |
Issue Date: | 16-Dec-2013 | Project: | FCT - PhD grant SFRH/BD/62647/2009 FCT - project PEst-OE/EEI/LA0008/2013 |
Serial title, monograph or event: | Optics Express | Volume: | 21 | Issue: | 25 | Abstract: | In this paper, we investigate the performance of intensity modulation with optical carrier reduced by biasing a dual-electrode Mach-Zehnder modulator (DEMZM) below its quadrature point, in the presence of controlled modulation chirp. The effects of the modulation chirp and of the bias point of a DEMZM on the received signal are analytically derived for small-signal operation. The interaction of these two effects is assessed in terms of optical signal to noise ratio (OSNR) required for a BER = 10(-9), through a comparison between double sideband (DSB) modulation and double sideband - reduced carrier (DSB-RC) modulation, by numerical simulation. We found that the power of the optical carrier has impact on the optimum value of the α chirp parameter and that a positive value of the α chirp parameter can be the optimum value to drive a DEMZM, depending on the central frequency of the orthogonal frequency division multiplexing (OFDM) signal and on the DEMZM bias point. | URI: | https://hdl.handle.net/10316/102706 | ISSN: | 1094-4087 | DOI: | 24514653 1094-4087 1094-4087 24514653 10.1364/OE.21.030764 24514653 1094-4087 24514653 1094-4087 |
Rights: | openAccess |
Appears in Collections: | I&D IT - Artigos em Revistas Internacionais |
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oe-21-25-30764.pdf | 872.99 kB | Adobe PDF | View/Open |
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