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100 Gbit/s operation of a 1.3 μm, 4‐channel directly modulated laser (DML) array monolithically integrated multimode interference (MMI) coupler is demonstrated for the first time. An optical modulation amplitude exceeding −0.7 dBm and clear eye openings are achieved at 55°C under simultaneous operation.
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Kobayashi et al. (2015) studied this question.
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