Troppenz, U.U.TroppenzKreissl, J.J.Kreissl2022-03-062022-03-062021https://publica.fraunhofer.de/handle/publica/26888210.1038/s41566-020-00739-x2-s2.0-85097954051Two independent reports of directly modulated lasers with bandwidths of >60 GHz may help bring data rates beyond 200 Gb s-1 to low-cost optical communication systems. Key to the successes has been managing photonic feedback effects within the laser cavities.en621535journal article