10 km CWDM Transmission using 56 Gb/s PAM-4 Directly Modulated Lasers for 200G/400G Transceivers

56 Gb/s PAM-4 modulation and 10 km transmission of CWDM, low RIN DFB lasers, based on high volume manufacturing capable, ridge waveguide (RWG) platform, operating up to 70 °C, is experimentally demonstrated.

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