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Multiplier-Free Intrachannel Nonlinearity Compensating Algorithm Operating at Symbol Rate
Intrachannel nonlinearity is considered a major distortion in high-capacity transmission systems particular for the case without inline optical chromatic dispersion compensation. In this paper, a
Experimental demonstration of 448-Gbps+ DMT transmission over 30-km SMF
We have experimentally demonstrated 469-Gbps transmission over 30-km SMF using DMT on a LAN-WDM system for 400-Gbps Ethernet. Only four directly modulated lasers and direct detectors as optical
100 Gb/s optical IM-DD transmission with 10G-class devices enabled by 65 GSamples/s CMOS DAC core
100 Gb/s optical IM-DD transmission over 10 km SMF is experimentally demonstrated by using discrete multi-tone and CMOS DAC core. The limiting factors towards further reach extension are investigated.
Simple Fiber Model for Determination of XPM Effects
Previous investigations have revealed that the impairments of the cross-phase modulation (XPM) in dense wavelength-division multiplexing (DWDM) systems include two aspects: the XPM-induced phase
80 km IM-DD transmission for 100 Gb/s per lane enabled by DMT and nonlinearity management
The nonlinearity management through parameter optimization and digital compensation is discussed and117Gb/s single wavelength and polarization IM-DD transmission over 40km SMF is first enabled by DMT.
Spectrally Efficient Quadrature Duobinary Coherent Systems With Symbol-Rate Digital Signal Processing
It is shown that DP-QDB with MLSD well trades off major requirements on advanced modulation formats, and the tolerances to narrowband optical filtering, ADC sampling phase, duobinary-generating filter bandwidth, laser linewidth, and carrier frequency offset are investigated.
Digital clock recovery algorithm for Nyquist signal
A novel algorithm is proposed, which has lower timing jitter, and its tolerance to various distortions is investigated, that fails on Nyquist signal with sinc pulse shape.
Wide-range, Accurate and Simple Digital Frequency Offset Compensator for Optical Coherent Receivers
We present a digital frequency offset compensator for optical coherent QPSK receivers. The compensation accuracy reaches ± 30 MHz while the range covers ± 5 GHz. This would realize coherent receivers
Implementation efficient nonlinear equalizer based on correlated digital backpropagation
This paper proposes a method for implementation complexity of nonlinear equalizer based on digital backpropagation that overcomes this boundary and improves the efficiency by about four times.
OSNR monitoring by deep neural networks trained with asynchronously sampled data
By using 5-layers DNN trained with 400,000 samples, the DNN successfully estimates OSNR in a 16-GBd DP-QPSK system with minimum prior knowledge.