Abstract
In this paper, we experimentally demonstrate a net bit rate of 261.7 Gbit/s in a seven-core transmission system with a Kramers–Kronig (KK) receiver. The 10 GBaud 16-level quadrature amplitude modulation (QAM) signal is transmitted over a 2.5 km seven-core fiber, and the relationship between carrier-to-signal power ratio, signal power, frequency spacing, and optical power is analyzed. Moreover, a multiple-input multiple-output (MIMO) Volterra equalization algorithm with crosstalk-dependent steps is proposed to compensate for inter-core crosstalk and impairments induced by other devices. Compared to the single-input single-output (SISO) Volterra equalizer, the CSPR can be reduced by 1.3 dB, and the received power gain can reach up to 0.7 dB.
Original language | English |
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Article number | 1017 |
Journal | Photonics |
Volume | 10 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sept 2023 |
Keywords
- Kramers–Kronig receiver
- MIMO
- Volterra equalizer
- crosstalk
- optical fiber communication
- seven-core transmission