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Exploiting fibre optics transmission capacity: 4-quadrature multilevel signalling

Exploiting fibre optics transmission capacity: 4-quadrature multilevel signalling

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© The Institution of Electrical Engineers
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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.

Inspec keywords: channel capacity; optical communication; light polarisation; optical waveguide theory; optical links; optical fibres

Other keywords: fibre optics transmission capacity exploitation; theoretical Shannon limit; 4-quadrature multilevel signalling; four degrees of freedom exploitation; system performance; multilevel coherent optical system

Subjects: Information theory; Waveguide and cavity theory; Optical communication; Fibre optics

References

    1. 1)
      • S. Betti , F. Curti , G. de Marchis , E. Lannone . A novel multilevel coherent optical system: 4-quadrature signalling. IEEE J. Lightwave Technol.
    2. 2)
      • S. Betti , F. Curti , G. de Marchis , E. Lannone . Phase-noise and polarization state insensitive optical coherent systems. IEEE J. Lightwave Technol. , 5 , 756 - 767
    3. 3)
      • R. Calvaifl , R. Caponi , F. Cisternino . Polarisation phase shift keying: A coherent transmission technique with differential heterodyne detection. Electron. Lett. , 10 , 642 - 643
    4. 4)
      • Betti, S., Curti, F., de Marchis, G., Iannone, E.: `Patent filed', , April 1990.
    5. 5)
      • S. Benedetto , P. Poogiount . Performance evaluation of multilevel polarisation shift keying modulation schemes. Electron. Lett. , 4 , 244 - 246
    6. 6)
      • G. de Marcms , S. Betn , F. Curti , E. Iannone . Multilevel coherent optical system based on Stokes parameters modulation. IEEE J. Lightwave Technol. , 7
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