This document may be downloaded, read, stored and printed for your own use within the limits of § 53 UrhG but it may not be distributed via the internet or passed on to external parties.Dieses Dokument darf im Rahmen von § 53 UrhG zum eigenen Gebrauch kostenfrei heruntergeladen, gelesen, gespeichert und ausgedruckt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.Radziunas, MindaugasGlitzky, AnnegretBandelow, UweWolfrum, MatthiasTroppenz, UteKreissl, JochenRehbein, Wolfgang2016-03-242019-06-2820060946-8633https://doi.org/10.34657/2557https://oa.tib.eu/renate/handle/123456789/3063We explore the concept of passive-feedback lasers for direct signal modulation at 40 Gbit/s. Based on numerical simulation and bifurcation analysis, we explain the main mechanisms in these devices which are crucial for modulation at high speed. The predicted effects are demonstrated experimentally by means of correspondingly designed devices. In particular a significant improvement of the modulation bandwidth at low injection currents can be demonstrated.application/pdfeng510Semiconductor laserpassive feedbackmodulation bandwidthdirect modulationdampingsmall signal responselarge signal responseeye diagramReport