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We evaluated high-speed behaviour of electrically driven photonic crystal lasers by direct modulations and found that they had 17.8-GHz 3-dB bandwidth. A 25-Gbit/s eye diagram was also demonstrated with a bias current as low as 150 μA.
We demonstrated the direct modulation of photonic-crystal nanocavity lasers to realize on-chip optical interconnects. A maximum 3-dB bandwidth of 16.2 GHz was obtained. We achieved a 17-Gb/s eye opening with a 35.3-fJ/bit energy cost.
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