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Designs break bandwidth record

Two 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.

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Fig. 1: Ultrafast directly modulated semiconductor lasers.


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Correspondence to Ute Troppenz.

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Troppenz, U., Kreissl, J. Designs break bandwidth record. Nat. Photonics 15, 4–5 (2021).

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