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. 2022 Jun 6;30(12):20194-20202.
doi: 10.1364/OE.457603.

30 Gbit/s PAM4 transmission using an 8-GHz directly modulated multi-section laser

Marcos Troncoso Costas, Ahmed Galib Reza, Hima Putta, Ankit Sharma, Gaurav Jain, Mark Smyth, Frank Smyth, John MacDougall, Colm Browning, Francisco Diaz Otero, Liam Barry
Free article

30 Gbit/s PAM4 transmission using an 8-GHz directly modulated multi-section laser

Marcos Troncoso Costas et al. Opt Express. .
Free article

Abstract

This paper describes the characterization of a novel directly modulated multi-section laser with a master-slave configuration. Amplitude and phase noise measurements show relative intensity noise values of around -150 dB/Hz and a 3-dB linewidth of around 3 MHz. The laser's suitability for optical access networks, enabled by the chirp reduction from the external injection locking, is shown by demonstrating unamplified 30 Gbit/s C-band transmission over 25 km and 50 km of single mode fiber using PAM4, as well as 30 Gbit/s PAM4 and PAM8 amplified transmission over 75 km.

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