Single-carrier 400G unrepeatered WDM transmission using nonlinear compensation and DD-LMS with FEC feedback
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Universidade Federal de Minas Gerais
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In this paper, we investigate the performance of unrepeatered optical transmission using nonlinear compensation, and dynamic equalization enhanced by forward error correction (FEC) feedback. The digital back-propagation (DBP) algorithm is used for nonlinear compensation, while error correction is provided by spatially-coupled low-density parity-check (SC-LDPC) codes. The technique is experimentally evaluated by the unrepeatered WDM transmission of 16×400 Gb/s single-carrier channels (66 GBd DP-16QAM) within a 75 GHz grid over 403 km (64.7 dB span loss), achieving 2.58 Pb/s km. The results indicated Q2 margins to the FEC limit of up to 0.4 and 0.5 dB for 3 and 6-dBm average launch powers, respectively, exhibiting a tangible improvement compared with previous works.
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Fibras óticas, Comunicações óticas, Ondas óticas
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Nonlinear optics , Forward error correction , Adaptive optics , Optical feedback , Optical pumping , Optical polarization , Optical signal processing, Single-carrier 400G , unrepeatered systems , nonlinear compensation , forward error correction, Forward Error Correction , Nonlinear Compensation , WDM Transmission , Backpropagation Algorithm , Low-density Parity-check Codes , Low-density Parity-check , Decoding , Optical Fiber , Number Of Steps , Optical System , Analog-to-digital Converter , Orthonormal , Average Gain , Optical Power , Digital Signal Processing , Local Oscillator , Arbitrary Waveform Generator , Erbium-doped Fiber , Optical Link , Optical Communication Systems , Parity-check Matrix , Symbol Rate , Coherent Receiver , Self-phase Modulation , Balanced Photodetector , Modulation Formats , In-phase Components , Quadrature Components
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https://ieeexplore.ieee.org/document/8121038