Gain recovery dynamics and limitations in quantum dot amplifiers

Tommy Winther Berg, Svend Bischoff, Ingibjörg Magnúsdóttir, Jesper Mørk, Paola Borri

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Summary form only given. While ultra-low threshold current densities have been achieved in quantum dot (QD) lasers, the predicted potential for high-speed modulation has not yet been realized despite the high differential gain. Furthermore, recent single pulse experiments demonstrated very fast gain recovery in a quantum dot amplifier, and it is thus not yet clear what the limiting processes for the device response are. We present the results of a comprehensive theoretical model, which agrees well with the experimental results, and indicates the importance of slow recovery of higher energy levels. The model used is of the rate-equation type with three energy levels: ground state (GS) and excited state (ES) dot levels and a wetting layer
Original languageEnglish
Title of host publicationProceedings on Technical Digest Lasers and Electro-Optics
Publication date2001
ISBN (Print)15-57-52662-1
Publication statusPublished - 2001
EventConference on Lasers and Electro-Optics 2001 - Baltimore, MD, United States
Duration: 6 May 200111 May 2001


ConferenceConference on Lasers and Electro-Optics 2001
CountryUnited States
CityBaltimore, MD

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