Multidimensional modulation formats for coherent optical communications
Paper in proceeding, 2016

Coherent optical communication systems applying modulation formats with a dimensionality of four or higherare investigated and compared to systems using conventional formats. Higher dimensionality can be achieved by applying modulation over more than one polarization, time-slot, wavelength, mode or core. Both uncoded systems and systems applying forward-error correction (FEC) coding are studied in terms of spectral efficiency and sensitivity. It is shown that increasing the dimensionality for a constant spectral efficiency improves the sensitivity substantially if no coding is applied, whereas the corresponding gains generally are much smaller in FEC-coded systems.

multidimensional modulation formats

Modulation formats

asymptotic power efficiency

coherent optical communication systems

power efficiency


Tobias Eriksson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Erik Agrell

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Magnus Karlsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Proceedings of SPIE - The International Society for Optical Engineering

0277786X (ISSN) 1996756X (eISSN)

Vol. 9774 977403
978-151060009-6 (ISBN)

Next-Generation Optical Communication: Components, Sub-Systems, and Systems V
San Francisco, USA,

Areas of Advance

Information and Communication Technology

Subject Categories


Communication Systems



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8/8/2023 6