Adiabatic Chirp Impact on the OSNR Sensitivity of Complex Direct Modulation: An Experiment Investigation
Di Che, Yuan Feng, William Shieh · Optical Fiber Communication Conference · 2017
We study the adiabatic chirp impact on the complex direct modulation using polarization-multiplexed PAM-4 system by varying signal baud-rate with data-rate up to 120 Gb/s. Experiment shows insufficient chirp at 30-Gbaud degrades >4 dB OSNR sensitivity compared with 10-Gbaud.