Journal article · Ahead of Print article
Dual-polarization NFDM transmission using distributed Raman amplification and NFT-domain equalization
Transmission systems based on the nonlinear Fourier transform (NFT) can potentially address the limitations in transmission reach and throughput set forth by the onset of Kerr-induced nonlinear distortion. Whereas this technique is at a preliminary research stage, a rapid progress has been shown over the past few years leading to experimental demonstrations of dual-polarization systems carrying advanced modulation formats.
The lossless transmission required by the NFT to ensure the theoretical validity of the scheme is a fairly strong requirement considering practical transmission links. Here, we address it by using optimized distributed Raman amplification to minimize the power variations to approx. 3 dB over 200 km, thus approaching the lossless transmission requirement.
Additionally we experimentally evaluate the improvement provided by equalization schemes applied to the signals in the nonlinear Fourier domain. By combining distributed Raman amplification and nonlinear-Fourier-domain equalization we show transmission reaches for dual-polarization nonlinear frequency division multiplexing (NFDM) systems transmitting both two eigenvalues (8 bit/symbol) up to 2200 km and three eigenvalues (12 bit/symbol) up to more than 600 km at hard-decision (HD) and soft-decision (SD) forward error correction (FEC) threshold, respectively.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2018 |
| Pages: | 1983-1986 |
| ISSN: | 19410174 and 10411135 |
| Types: | Journal article and Ahead of Print article |
| DOI: | 10.1109/LPT.2018.2874204 |
| ORCIDs: | Gaiarin, Simone , Da Ros, Francesco , da Silva, Edson P. and Zibar, Darko |
Equalization Nonlinear Fourier transform Nonlinear frequency division multiplexing Raman amplification
Eigenvalues and eigenfunctions Equalizers Fourier transforms Kerr-induced nonlinear distortion Modulation NFT-domain equalization Nonlinear optics OFDM modulation Optical fiber communication Optical receivers Propagation losses advanced modulation formats dual-polarization NFDM transmission dual-polarization nonlinear frequency division dual-polarization systems eigenvalues and eigenfunctions equalisers equalization equalization schemes experimental demonstrations fairly strong requirement forward error correction frequency division multiplexing lossless transmission requirement nonlinear Fourier nonlinear Fourier transform optical Kerr effect optical communication equipment optical fibre amplifiers optical fibre communication optical modulation optimized distributed Raman amplification telecommunication channels transmission links transmission reach transmission systems
