Abstract
We experimentally demonstrated transmitting 40\,\times\,117.6 Gb/s 16 quadrature amplitude modulation with orthogonal frequency division multiplexing modulation over 10 181 km. The following techniques are applied to achieve error-free transmission: 1) hybrid large-core/ultralow-loss fibers were used for improving received optical signal-to-noise ratio while enhancing fiber nonlinearity tolerance; 2) multiband nonlinearity compensation algorithm was performed to further improve nonlinearity tolerance; 3) the forward error correction (FEC) limit of 5.3 dB provided by the concatenation of hard-decision and soft-decision FEC codes ensures to have error-free transmission after turbo equalizer with memory of three symbols, thus attaining a spectral efficiency of 4.7 b/s/Hz.
Original language | English (US) |
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Article number | 6249709 |
Pages (from-to) | 498-505 |
Number of pages | 8 |
Journal | Journal of Lightwave Technology |
Volume | 31 |
Issue number | 4 |
DOIs | |
State | Published - 2013 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
Keywords
- 16-quadrature amplitude modulation (16QAM)
- Long-haul
- low-density parity-check (LDPC)
- nonlinearity compensation (NLC)
- spectral efficiency (SE)