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We experimentally demonstrate transmission of 20×50-Gb/s WDM PAM-4 channels over an 80-km uncompensated fiber link, based on reduced complexity DSP and hardware. BER values below pre-FEC limit of 3.8×10·3 are reported, validating the proposed architecture for low-cost, high-capacity short-reach connectivity.
We investigate some key requirements for PAM4 operation at 56 Gbaud focusing on short-reach intra-data center interconnect. We report simulated results of bandwidth limitations for transmitter and receiver sides components with and without pulse shaping, presenting the penalties imposed in each scenario. We also evaluate chromatic dispersion tolerance for different values of bandwidth limitations,...
We experimentally investigate, in a $20\times56$ -GBd 400 G WDM transmission system, different approaches for nonlinear compensation in spectrally sliced optical receivers with MIMO-based signal reconstruction. Slice-by-slice nonlinear compensation shows comparable performance to inter-slice nonlinear compensation in a WDM system. In addition, an eight-stages compensation yields a 0.4-dB Q2 gain...
This paper experimentally demonstrates Polymer-based transmitter optical sub-assembly (TOSA) for CFP2-ACO modules running at 100G/200G Flexigrid WDM (37.5 GHz). Compared to LiNbO3, the ultra-compact TOSA provides excellent performance both in back-to-back and over long-haul distances.
We analyze the performance limits of the digital back-propagation (DBP) algorithm implemented in application specific integrated circuits (ASIC). The proposed hardware implementation, jointly with a set of other digital signal processing (DSP) blocks, was experimentally evaluated by processing a 32 GBd PDM-16QAM signal. In the transmitter side, it is discussed the linear filters complexity for Nyquist...
In this paper, we demonstrate a transmission of three 450 Gb/s (9×50-Gb/s DP-QPSK) superchannels with spectral efficiency (SE) of 3.73 b/s/Hz, using coherent optical orthogonal frequency division multiplexing (CO-OFDM), over pure silica core fiber (PSCF) and amplification only by erbium doped fiber amplifiers (EDFAs). A maximum reach of 3842 km was obtained. The results shows that this approach can...
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