The physical layer data plane design of an all-optical network switch capable of scaling to 1024 ports at 25 Gb/s per port is presented and experimentally evaluated. Fast-tuning DSDBR lasers modulated with line-coded bipolar data allow combined wavelength switching and time-division multiple access to provide packet switch-like functionality with over 2 Tb/s of total switch bandwidth. A passive fiber star coupler core with high sensitivity DSP-free coherent receivers creates a low complexity easily upgradeable building block for data center networks.
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Funnell et al. (2017) studied this question.
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