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100-Gb/s WDM Nyquist-16QAM signals (10×10Gb/s with 15GHz channel spacing) are generated by intensity modulation on silicon MZM. After 160 km SSMF transmission and direct detection, the BERs of all the ten channels are below the FEC threshold of 3.8×10−3.
In this paper, we propose to use an efficient laser phase noise suppression algorithm for PDM CO-OFDM, which can compensate both CPE and ICI. The proposed method can significantly promote the system robustness against laser phase noise evidently.
XPM statistics in 100% pre-compensated WDM transmission depends on bit rates, transmission fibres and modulation formats. XPM in DPSK systems shows much less stochastic than that in OOK systems.
We show by simulation that for chromatic dispersion compensation of RZ-OOK and DB signals, the performance of electronic equalization can be significantly enhanced with dual-vestigial-sideband filtering and joint equalization.
A bit error rate estimation method based on Parzen series is proposed for coherent detection QPSK transmission systems. Numerical simulation results show the proposed method's consistency with Monte Carlo method while keeping lower computational intensity.
We experimentally demonstrate the mitigation of intra-channel nonlinearities in 10GBaud coherent quadrature phase shift keying systems via nonlinear electrical equalizer based on Volterra theory. The performance of nonlinear transmission systems is significantly improved.
We present a concept of improving MLSE by diverse reception. Simulation results show CD tolerance of 42.7G NRZ-OOK system is 382 ps/nm at 3 dB OSNR penalty.
We present simulation of electrical joint equalization including both DFE and Viterbi equalizer for PMD compensation in direct-detection PDM systems. The benefit of utilizing joint equalizer for dynamic polarization control is also investigated.
We investigate numerically XPM-induced nonlinear phase noise in 40 Gb/s RZ-DPSK WDM systems with different dispersion maps. The result shows that nonlinear phase noise due to XPM can be effectively suppressed by optimizing dispersion map.
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