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The first experimental demonstration of nonbinary-LDPC-coded optical transmission is presented. Using DQPSK, we can achieve >;8dB and ~10dB net coding gains at the BER of 10-6 in the absence and presence of I/Q imbalance, respectively.
The dynamic input power range resulting in BER<;10-3 using our proposed joint-SPM compensation scheme can be increased by 0.4 dB and 1.2 dB, compared to separately compensate for SPM at either transmitter or receiver side.
We have experimentally demonstrated 42.8 Gb/s DWDM transmission over 3900 km SMF-28 with 12.5-GHz channel spacing and coherent detection. Eight polarization-multiplexed-RZ-QPSK signals have been successfully transmitted over 3000 and 3900-km SMF-28 with BER< 8 ?? 10-4 and 2 ?? 10-3, repetitively.
We experimentally demonstrate a novel decision-aided maximum likelihood phase estimation in an 8-Channel 42.8-Gbit/s DWDM coherent PolMux QPSK system. The results show that our proposed algorithm can achieve a comparable performance as the Mth-power while having much lower computational complexity.
We propose and experimentally demonstrate a novel, dual-stage frequency offset estimator and achieve the widest range of ?? 0.5 times the system symbol rate for the first time in a 42.8-Gbit/s coherent PolMux QPSK receiver.
Dual-polarization operation of all-optical IFFT/FFT elements is demonstrated for the first time employing coupler interferometry. All-optical OFDM transmission at 100-Gb/s for two QPSK-PDM sub-carriers was experimentally performed using two matched 25 G DMZIs and coherent detection.
By using only C-band EDFAs, we have transmitted hybrid 10times112 and 10times44 Gb/s PolMux-QPSK signals in 25 GHz channel spacing over 1600-km SSMF employing digital coherent detection. The measured BER for all channels is smaller than 1.2times10-3.
A novel iteratively detected Sphere Packing (SP) modulation aided Orthogonal Frequency Division Multiplexing (OFDM) scheme is proposed, which we refer to as the SP- OFDM arrangement. The advocated SP-OFDM system outperforms conventional OFDM dispensing with SP. As its upper- bound performance limit, the Discrete Input Continuous Output Memoryless Channel (DCMC) capacity of this system is formulated...
A novel 100 Gbit/s transmitter has been proposed and experimentally demonstrated. It can tolerate over 20 ps DGD. After transmission over 300 km conventional SMF, the power penalty is 0.7 dB.
We have successfully demonstrated that an inversion-RZ pulse signal can be employed in a 50Gbit/s RZ-DQPSK payload per channel and 50GHz channel spacing optical packet switching network as an orthogonal modulation optical label. This inversion-RZ optical label is generated by a novel and simple scheme.
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