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An optimized vector-quantization-inspired signal constellation design (OVQ-SCD) suitable for multidimensional optical transport is proposed, in which signal constellation radii transformation function is optimized and near-uniform distribution of points is achieved. The proposed OVQ-SCD is used in a tandem with a hybrid multidimensional coded-modulation scheme employing Slepian sequences as electrical...
Single carrier 400G signal generation and detection is achieved using 100GbE-grade modulator and photo-detectors with novel 4-PAM to 16-QAM signal emulation. Eight DP-16QAM channels are transmitted using EDFA-only amplification over 2,424-km, achieving 5.33-b/s/Hz spectral efficiency.
We propose a method to optimize passbands for DWDM system upgrade using tunable asymmetric interleaver, and experimentally demonstrated the passband optimization and overall performance improvement on hybrid 40G and 100G DWDM system with various modulation formats.
Employing raised-cosine pulse-shaped PDM-36 QAM modulation and both pre- and posttransmission digital equalization, we demonstrate 12.5GHz-spaced, 640 ?? 107 Gbits/s DWDM transmission over 4 ?? 80 km of ultra-large-area fiber with a record capacity of 64 Tb/s at 8 b/s/Hz spectral efficiency.
We present a power-variable rate-adaptive LDPC-coded polarization multiplexed coherent OFDM scheme, suitable for use in optically-routed networks in which different lightwave paths experience different penalties due to deployment of ROADMs and WXCs. We demonstrate that channel capacity can be closely approached with proposed scheme.
We designed and built a novel all-optical re-timing, re-amplifying, and re-shaping (3R) regeneration system based on terahertz optical asymmetric demultiplexers (TOADs) developed in our laboratory. The system is capable of parallel processing multiple wavelengths, a feature which will significantly improve the scalability of current wavelength division multiplexing (WDM) networks. Performance against...
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