Journal article
Temporal probabilistic shaping for mitigation of nonlinearities in optical fiber systems
Department of Photonics Engineering, Technical University of Denmark1
Coding and Visual Communication, Department of Photonics Engineering, Technical University of Denmark2
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark3
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark4
In this paper, finite state machine sources (FSMSs) are used to shape quadrature amplitude modulation (QAM) for nonlinear transmission in optical fiber communication systems. The previous optimization algorithm for FSMSs is extended to cover an average power constraint, thus enabling temporal optimization with multiamplitude constellations output, such as QAM.
The optimized source results in increased received SNR and, thereby, increased achievable information rates (AIR)s under memoryless assumption. The AIR is increased even further when taking the channel and transmitter memory into account via trellis processing at the receiver. Significant gains are reported in the highly nonlinear region of transmission for an FSMS of up to second order and 16QAM and particularly for unrepeated transmission.
At the optimal launch power of WDM transmission, the FSMS order needs to be increased further in order to notably outperform previous probabilistic shaping schemes.
Language: | English |
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Publisher: | IEEE |
Year: | 2017 |
Pages: | 1803-10 |
ISSN: | 15582213 and 07338724 |
Types: | Journal article |
DOI: | 10.1109/JLT.2017.2671452 |
ORCIDs: | Yankov, Metodi Plamenov , Larsen, Knud J. and Forchhammer, Søren |
16QAM Nonlinear optics Optical receivers Optical transmitters Optimization Probabilistic logic Quadrature amplitude modulation WDM transmission achievable information rates channel memory finite state machine sources finite state machines memoryless assumption multiamplitude constellations nonlinear distortion nonlinear optics nonlinear transmission nonlinearity mitigation optical fiber communication systems optical fiber systems optical fibre communication optical modulation optical receivers optical transmitters power constraint probabilistic shaping probability quadrature amplitude modulation received SNR receiver telecommunication channels temporal optimization temporal probabilistic shaping transmitter memory trellis processing wavelength division multiplexing