Title :
Exploiting fibre optics transmission capacity: 4-quadrature multilevel signalling
Author :
Betti, S. ; Curti, F. ; de Marchis, G. ; Iannone, Eugenio
Author_Institution :
Fondazione Ugo Bordoni, Roma, Italy
fDate :
7/5/1990 12:00:00 AM
Abstract :
The principle scheme of a new multilevel coherent optical system is presented which shows how to exploit the four degrees of freedom of the optical field. The proposed system performance gets nearer to the theoretical Shannon limit than conventional and polarisation modulated multilevel systems for a high number of levels.
Keywords :
channel capacity; light polarisation; optical communication; optical fibres; optical links; optical waveguide theory; 4-quadrature multilevel signalling; fibre optics transmission capacity exploitation; four degrees of freedom exploitation; multilevel coherent optical system; system performance; theoretical Shannon limit;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900644
