Influence of pre-and post-compensation of chromatic dispersion on equalization enhanced phase noise in coherent multilevel systems

• In this paper we present a comparative study of the equalization enhanced phase noise (EEPN) for preand post-compensation of chromatic dispersion in high capacity and high constellation systems. This is - to our knowledge - the first detailed study in this area for precompensation systems. Our main results show that the local oscillator phase noise determines the EEPN influence in post-compensation implementations whereas the transmitter laser determines the EEPN in pre-compensation implementations. As a result of significance for the implementation of practical longer-range systems it is to be emphasized that the use of chromatic dispersion equalization in the optical domain - e.g. by the use of dispersion compensation fibers - eliminates the EEPN entirely. Thus, this seems an efficient solution for such systems operating at high constellations in the future.

Ämnesord

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Nyckelord

Comparative studies; Constellation systems; Dispersion-compensation fibers; Equalization enhanced phase noise (EEPN); High capacity; Local oscillators; Multi-level systems; Optical domains; Post-compensation; Pre-compensation; Quadrature phase shifts; Transmitter lasers

Chromatic dispersion; Dispersion compensation; Phase noise; Quadrature phase shift keying

Dispersions

Publikations- och innehållstyp

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