Evaluation of 4-PAM, NRZ and Duobinary Modulation Formats Performance for Use in 20 Gbit/s DWDM-PON Optical Access Systems

2018 Advances in Wireless and Optical Communications (RTUWO 2018): Proceedings 2018
Toms Salgals, Laura Skladova, Klinta Zvirbule, Jānis Braunfelds, Sandis Spolītis

In this paper we compared performance of different modulation formats in 8-channel dense wavelength division multiplexed passive optical network (DWDM-PON). Higher spectral efficiency four-level pulse amplitude modulation (PAM-4) format operating at 10 Gbaud/s (20 Gbit/s) transmission speed per channel is compared to same bitrate non-return-to-zero (NRZ) and duobinary (DB) modulation formats in order analyze their performance in terms of maximal transmission distance and minimal channel spacing with pre-FEC BER ≤ 10-3. Through mathematical modelling it was found that the maximal achievable transmission distance of DB and spectrally efficient PAM-4 modulation formats in DWDM-PON system are 62 km and 50 km, respectively. It is numerically shown that DB modulation format has 19% better transmission reach than PAM-4 for 20 Gbit/s transmission systems.

Keywords
optical access, dense wavelength division multiplexed passive optical networks, PAM-4, duobinary, NRZ, NG-PON2
DOI
10.1109/RTUWO.2018.8587887
Hyperlink
https://ieeexplore.ieee.org/document/8587887

Salgals, T., Skladova, L., Vilcāne, K., Braunfelds, J., Spolītis, S. Evaluation of 4-PAM, NRZ and Duobinary Modulation Formats Performance for Use in 20 Gbit/s DWDM-PON Optical Access Systems. In: 2018 Advances in Wireless and Optical Communications (RTUWO 2018): Proceedings, Latvia, Riga, 15-16 November, 2018. Piscataway: IEEE, 2018, pp.134-138. ISBN 978-1-5386-5559-7. e-ISBN 978-1-5386-5558-0. Available from: doi:10.1109/RTUWO.2018.8587887

Publication language
English (en)