InP CDM and ICR Enabled 128Gbaud/ DP-16QAM-PS and 120Gbaud/DP-QPSK Long-Haul Transmission
You-Wei Chen, Konstantin Kuzmin, Rui Zhang, M. Poirier, Tadatoshi Tomimoto, G. Zarris, R. L. Moore, Chengkun Chen, Wuchun Wu, Jun Huang, Marcel Boudreau, Hui Xu, W.I. Way
Abstract
We experimentally demonstrated record rOSNR performance for both 400 Gb/s and 800 Gb/s transmissions over EDFA-only 1500 and 1000 km SSMF, respectively, by using ≥64 GHz 3 dB bandwidth InP coherent driver modulator (CDM) and intradyne coherent receiver (ICR). At 400 Gb/s via 120 Gbaud/DP-QPSK, a 16.1 dB back-to-back (BtB) rOSNR at the 15% oFEC BER threshold of 2e-2 and a large 6.9 dB OSNR margin after 1500 km can be achieved. At 800 Gb/s via 120 Gbaud/DP-16QAM, a BtB rOSNR of 25 dB and an rOSNR after 800 km of 25.8 dB can be achieved. We also observed that by employing probabilistic shaping (PS) with 128Gbaud/DP-16QAM-PS, the BtB rOSNR performance can be further improved by 1.6 dB at a cost of a 1.7 dB lower transmitter output power as compared to those of uniformly-distributed 16QAM. As a result, a 24.3 dB rOSNR and a superior OSNR margin of 2.4 dB after 1000 km transmission can be achieved. The demonstrated state-of-art bandwidth <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> distance performance by using practically implementable InP CDM and ICR shows a promising solution for future line-cards and pluggable modules in long-haul transmission systems.