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Coherent TWDM-PON Downstream Architecture Based on a Chip-Scale QD-MLLD

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We propose a novel coherent TWDM PON architecture. Using a chip-scale QD-MLLD and low-cost thermally tuned DFB lasers, we demonstrate error-free reception of 80 Gb/s at a loss budget of 28 dB with ONU laser variation of 2 nm (0.25 THz).

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