Abstract
We demonstrate wavelength-division-multiplexed (WDM) and space-division-multiplexed (SDM) transmission of probabilistically shaped polarization-division-multiplexed (PDM) 1024-state quadrature amplitude modulation (QAM) channels over a 9.7-km single-mode 30-core fiber, achieving aggregated spectral efficiency of 297.82 bit/s/Hz on a 12.5-GHz grid and 7.01-Tbit/s spatial-super-channel on a 25-GHz grid without multiple-input multiple-output (MIMO) processing. Actual soft-decision forward error correction (SD-FEC) decoding was employed to obtain error-free performance, and adaptive rates and spectral efficiencies for individualWDM/SDM channels have been applied according to their channel conditions, by adjusting the SD-FEC overhead without changing the modulation format. Probabilistically shaped PDM-1024-QAM has been used to further increase the aggregated achievable rate due to the added performance improvement through shaping gain.
Original language | English |
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Journal | Journal of Lightwave Technology |
Volume | 36 |
Issue number | 6 |
Pages (from-to) | 1304-1308 |
ISSN | 0733-8724 |
DOIs | |
Publication status | Published - 2018 |
Keywords
- 1024-state quadrature amplitude modulation (1024-QAM)
- Adaptive rate
- Forward error correction (FEC)
- Optical fiber communication
- Probabilistic Shaping
- Space division multiplexing (SDM)
- Spectral efficiency
- Wavelength division multiplexing (WDM)