We demonstrate both 100-GBaud PAM-4 and 80-GBaud PAM-8 transmissions over 10-km fiber using a 1315-nm 54-GHz distributed Bragg reflector laser with a transient chirp parameter of 1.0. The 80-GBaud PAM-8 system achieves a net bit rate of 200 Gb/s.

© 2020 The Author(s)

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