High spectral efficiency 8D polarization-ring-switching modulation formats

Bin Chen, Chigo Okonkwo, Hartmut Hafermann, Alex Alvarado

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademic

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Samenvatting

We propose two 8-dimensional (8D) modulation formats (8D-2048PRS-T1 and 8D-2048PRS-T2) with a spectral efficiency of 5.5 bit/4D-sym, where the 8 dimensions are obtained from two time slots and two polarizations. Both formats provide a higher tolerance to nonlinearity by selecting symbols with nonidentical states of polarization (SOPs) in two time slots. The performance of these novel 8D modulation formats is assessed in terms of the effective signal-to-noise ratio (SNR) and normalized generalized mutual information. 8D-2048PRS-T1 is more suitable for high SNRs, while 8D-2048PRS-T2 is shown to be more tolerant to nonlinearities. A sensitivity improvement of at least 0.25 dB is demonstrated by maximizing normalized generalized mutual information (NGMI). For a long-haul nonlinear optical fiber transmission system, the benefit of mitigating the nonlinearity is demonstrated and a reach increase of 6.7% (560 km) over time-domain hybrid four-dimensional two-amplitude eight-phase shift keying (TDH-4D-2A8PSK) is observed.
Originele taal-2Engels
Artikelnummer1904.06679v2
Aantal pagina's4
TijdschriftarXiv
Volume2019
DOI's
StatusGepubliceerd - 2019

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