Nonlinearity-Tolerant Probabilistically-Shaped Four-Dimensional Modulation at Spectral Efficiency of 9 Bits/Four-Dimensional Symbol
Network traffic between data centers has grown rapidly in recent years. Therefore, an optical modulation format with high spectral efficiency is desired in inter-data center links at data rates of more than 400 Gb/s in each wavelength. In order to further improve the transmission performance in sing...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/8/865 |
| _version_ | 1797583517060694016 |
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| author | Pengpeng Wei Bo Song Yixin Zhang Xiang Li |
| author_facet | Pengpeng Wei Bo Song Yixin Zhang Xiang Li |
| author_sort | Pengpeng Wei |
| collection | DOAJ |
| description | Network traffic between data centers has grown rapidly in recent years. Therefore, an optical modulation format with high spectral efficiency is desired in inter-data center links at data rates of more than 400 Gb/s in each wavelength. In order to further improve the transmission performance in single-span inter-data center links, a nonlinearity-tolerant probabilistically-shaped 4D modulation format with a spectral efficiency of 9 bits/4D symbol is proposed. The proposed modulation format fills the gap between polarization-multiplexed 16- and 32-ary quadrature-amplitude modulation (PM-16QAM and PM-32QAM). In numerical simulations, we compare our proposed modulation format with probability-amplitude-shaped 64QAM (PAS-64QAM) and 512-set-partitioned 32QAM (512SP-32QAM) at a spectral efficiency of 9 bits/4D symbol in a single-span transmission link. The simulation results indicate that the proposed modulation format shows better linear and nonlinear performances than a 512SP-32QAM format. Compared with PAS-64QAM format, the proposed modulation format can provide similar transmission performance with improved fiber nonlinear tolerance. |
| first_indexed | 2024-03-10T23:39:04Z |
| format | Article |
| id | doaj.art-e74f6b395dd941e5b3c43cf35695dc5d |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T23:39:04Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-e74f6b395dd941e5b3c43cf35695dc5d2023-11-19T02:38:53ZengMDPI AGPhotonics2304-67322023-07-0110886510.3390/photonics10080865Nonlinearity-Tolerant Probabilistically-Shaped Four-Dimensional Modulation at Spectral Efficiency of 9 Bits/Four-Dimensional SymbolPengpeng Wei0Bo Song1Yixin Zhang2Xiang Li3School of Automation, China University of Geosciences, Wuhan 430074, ChinaBeijing Institute of Space Science and Technology Information, Beijing 100072, ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing University, Nanjing 210093, ChinaSchool of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan 430074, ChinaNetwork traffic between data centers has grown rapidly in recent years. Therefore, an optical modulation format with high spectral efficiency is desired in inter-data center links at data rates of more than 400 Gb/s in each wavelength. In order to further improve the transmission performance in single-span inter-data center links, a nonlinearity-tolerant probabilistically-shaped 4D modulation format with a spectral efficiency of 9 bits/4D symbol is proposed. The proposed modulation format fills the gap between polarization-multiplexed 16- and 32-ary quadrature-amplitude modulation (PM-16QAM and PM-32QAM). In numerical simulations, we compare our proposed modulation format with probability-amplitude-shaped 64QAM (PAS-64QAM) and 512-set-partitioned 32QAM (512SP-32QAM) at a spectral efficiency of 9 bits/4D symbol in a single-span transmission link. The simulation results indicate that the proposed modulation format shows better linear and nonlinear performances than a 512SP-32QAM format. Compared with PAS-64QAM format, the proposed modulation format can provide similar transmission performance with improved fiber nonlinear tolerance.https://www.mdpi.com/2304-6732/10/8/865spectral efficiencynonlinearity-tolerantprobabilistically-shaped |
| spellingShingle | Pengpeng Wei Bo Song Yixin Zhang Xiang Li Nonlinearity-Tolerant Probabilistically-Shaped Four-Dimensional Modulation at Spectral Efficiency of 9 Bits/Four-Dimensional Symbol Photonics spectral efficiency nonlinearity-tolerant probabilistically-shaped |
| title | Nonlinearity-Tolerant Probabilistically-Shaped Four-Dimensional Modulation at Spectral Efficiency of 9 Bits/Four-Dimensional Symbol |
| title_full | Nonlinearity-Tolerant Probabilistically-Shaped Four-Dimensional Modulation at Spectral Efficiency of 9 Bits/Four-Dimensional Symbol |
| title_fullStr | Nonlinearity-Tolerant Probabilistically-Shaped Four-Dimensional Modulation at Spectral Efficiency of 9 Bits/Four-Dimensional Symbol |
| title_full_unstemmed | Nonlinearity-Tolerant Probabilistically-Shaped Four-Dimensional Modulation at Spectral Efficiency of 9 Bits/Four-Dimensional Symbol |
| title_short | Nonlinearity-Tolerant Probabilistically-Shaped Four-Dimensional Modulation at Spectral Efficiency of 9 Bits/Four-Dimensional Symbol |
| title_sort | nonlinearity tolerant probabilistically shaped four dimensional modulation at spectral efficiency of 9 bits four dimensional symbol |
| topic | spectral efficiency nonlinearity-tolerant probabilistically-shaped |
| url | https://www.mdpi.com/2304-6732/10/8/865 |
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