Abstract
C-band InP vertical cavity surface emitting laser (VCSEL) exploitation can be appealing also for high-capacity transmission over hundreds of kilometres. Long-wavelength VCSELs can represent an alternative solution for the development of transmitters with reduced cost, power consumption and footprint by adopting direct modulation (DM) and single sideband (SSB) discrete multitone (DMT) modulation to achieve dense wavelength division multiplexing (WDM) granularity. Due to numerous hops between nodes inside metropolitan area networks the effect of filtering can severely impact the transmission performance. We present preliminary experimental assessments of DM VCSEL sources with multi-carrier modulation formats, for more than 50 Gb/s per-channel transmission to target a metro network including nodes, handling 25-GHz granularity.
Highlights
Nowadays, most of the total data traffic is concentrated in less of the 5% of the geographical area, for example in the metropolitan area networks (MANs)
Fig. 2b) shows the b2b measured capacities achieved for optical signal to noise ratio (SNR) (OSNR) ranging from 30 dB to 40 dB in function of the number of crossed wavelength selective switching (WSS); experimental results obtained by a variable optical noise loader are compared with simulations
A slight reduction of the capacity appears for lower OSNRs, whereas the capacity barely reduces increasing the number of crossed WSS
Summary
Most of the total data traffic is concentrated in less of the 5% of the geographical area, for example in the metropolitan area networks (MANs). We present preliminary experimental assessments of DM VCSEL sources with multi-carrier modulation formats, for more than 50 Gb/s per-channel transmission to target a metro network including nodes, handling 25-GHz granularity.
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