DocumentCode :
807214
Title :
An efficient multilevel coherent optical system: M-4Q-QAM
Author :
Cusani, Roberto ; Iannone, Eugenio ; Salonico, Antonio Maria ; Todaro, Maria
Author_Institution :
Rome Univ., Italy
Volume :
10
Issue :
6
fYear :
1992
fDate :
6/1/1992 12:00:00 AM
Firstpage :
777
Lastpage :
786
Abstract :
A coherent multilevel transmission system based on the modulation of all the optical field degrees of freedom (the four quadratures of the optical field) is presented. The transmitted symbols are represented in the space of the field quadratures by a square lattice of points, so that both the transmitter and the decision devices can be easily implemented. The proposed modulation formats allow high spectral efficiency systems to be designed without paying a great sensitivity penalty with respect to binary systems. For this reason the proposed modulation format seems promising for application in densely spaced very-high-capacity FISM networks and in high-speed data transmission in parallel computers
Keywords :
frequency division multiplexing; light coherence; optical links; optical modulation; M-4Q-QAM; decision devices; densely spaced very-high-capacity FISM networks; field quadratures; frequency division multiplexing; high spectral efficiency systems; high-speed data transmission; modulation formats; multilevel coherent optical system; optical computers; optical field degrees of freedom; optical field modulation; optical interconnections; parallel computers; sensitivity penalty; square lattice of points; transmission system; transmitter; Data communication; Frequency division multiplexing; High speed optical techniques; Optical fiber polarization; Optical filters; Optical modulation; Optical network units; Optical receivers; Optical sensors; Optical transmitters;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/50.143078
Filename :
143078
Link To Document :
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