Wide Temperature Range Operation (20–80°C) of 53.2 Gbit/s NRZ Directly Modulated 1.3-μm DFB Lasers Transmitted Over 2 km

A 53.2 Gbit/s NRZ operation was achieved over a wide temperature range (WTR) of 20–80°C using direct modulation of 1.3-μm InGaAlAs-MQW DFB lasers. Moreover, clear eye openings were successfully demonstrated after a 2-km SMF transmission from 20 to 80°C for 400G datacenter applications.