Journal article
Nonlinear Phase Noise Compensation in Experimental WDM Systems with 256QAM
Department of Photonics Engineering, Technical University of Denmark1
Coding and Visual Communication, Department of Photonics Engineering, Technical University of Denmark2
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark3
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark4
Technical University of Munich5
Polytechnic University of Milan6
Nonlinear phase noise (NLPN) is studied in an experimental wavelength division multiplexed (WDM) system operating at 256QAM. Extremely narrow linewidth lasers (<1 kHz) at the transmitter and the receiver allow for extracting the phase part of the nonlinear noise in a Raman amplified link. Based on the experimental data, the autocorrelation function of the NLPN is estimated and it matches the theoretical predictions.
Several algorithms are examined as candidates for tracking and compensating the NLPN. It is shown that algorithms which exploit the distribution of the NLPN achieve higher gains than standard methods, which only exploit the correlation properties. Up to 300 km reach increase is achieved for a 5x10 GBaud WDM system with base distance of up to 1600 km.
The gains are comparable to the gains of single channel digital back-propagation, with even further improvements from the combination of both techniques.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2017 |
| Pages: | 1438-1443 |
| ISSN: | 15582213 and 07338724 |
| Types: | Journal article |
| DOI: | 10.1109/JLT.2016.2644860 |
| ORCIDs: | Yankov, Metodi Plamenov , Da Ros, Francesco , Porto da Silva, Edson , Zibar, Darko , Oxenløwe, Leif Katsuo , Galili, Michael and Forchhammer, Søren |
256QAM Correlation Erbium-doped fiber amplifiers Estimation Lasers NLPN Phase noise Raman amplified link Receivers Wavelength division multiplexing autocorrelation function bit rate 50000000000 Gbit/s experimental WDM systems fibre lasers gains narrow linewidth lasers nonlinear compensation nonlinear optics nonlinear phase noise nonlinear phase noise compensation optical links optical receivers optical transmitters phase extraction phase noise phase noise distribution quadrature amplitude modulation receiver single-channel digital backpropagation telecommunication channels transmitter wavelength division multiplexed system wavelength division multiplexing
