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We transmit CM DP-16QAM signals at 4.88 b/s/Hz SE in C+L band EDFAs. We demonstrate nonlinearity noise mitigation by MAP-LMS equalizer. We show 2 dB error-correction margin improvement over DP-8QAM after 6,673 km transmission.
4×10Gbps WDM transmission over low loss HC-PBGF at 2μm wavelengths is demonstrated using a 2mm long QCSE based InP MZM with Vπ of 6V and ER>20dB. An OSNR of 25dB is required to achieve error free transmission.
We demonstrate 100Gb/s 8D coded modulation transmission over 9,750 km with record high power efficiency as defined by the ratio of capacity-distance product to the total amplifier output power.
Using optimized hybrid Raman-EDFAs and coded modulation with variable spectral efficiency we achieve 54 Tb/s capacity over 9,150 km transmission. We also achieve a capacity-distance product of 534 Pb/s∗km after 10,230 km distance.
This paper presents WDM transmission at 2μm over 1.15km of HC-PBGF with wavelength channels selected to span a 36.3nm waveband. A total capacity of 81Gbit/s was achieved using 4×12.5Gbit/s NRZ-OOK external modulation and 4×7.7Gbit/s 4-ASK Fast-OFDM direct modulation signals.
We transmit 106 × 200 Gb/s channels over 10 290 km at 6.0 b/s/Hz enabled by Nyquist spectral shaping and digital back propagation (DBP). 53 × 400 Gb/s channels are also transmitted over 9200 km detecting two 200 Gb/s wavelengths simultaneously using a wideband receiver. DBP benefit versus channel pre-emphasis, average launch power per channel, and transmission distance are experimentally investigated...
This paper reviews recent advances in transoceanic distance transmission technology including digital spectral shaping, coded modulation, variable spectral efficiency, and nonlinearity compensation to facilitate higher capacity and higher spectral efficiency.
We transmit 30.58 Tb/s data (294×104 Gb/s) over 7,230 km in 40 nm bandwidth with 6.1 b/s/Hz spectral efficiency. We use PDM half-4D-16QAM coded modulation to achieve the highest reported capacity-distance product of 221 Pb/s·km.
We transmit 106×200 Gb/s channels over 10,290 km at 6.0 b/s/Hz enabled by Nyquist spectral shaping and nonlinearity compensation. We also transmit 53×400 Gb/s channels over 9,200 km detecting two 200 Gb/s wavelengths simultaneously using a wideband receiver.
We experimentally demonstrate inter-symbol interference (ISI) mitigation using a multi-tap constant modulus algorithm (CMA) for strongly filtered PDM RZ-QPSK and find it to be effective up to Nyquist channel spacing after transpacific transmission distances.
We have quantified the system margin afforded by polarization scrambling with a direct measurement of the errored events from a noise loaded FEC decoder. We have demonstrated a margin enhancement of 1.2 dB after 8,856 km transmission.
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