Semiconductor quantum-dot lasers and amplifiers

Jørn Märcher Hvam (Invited author), Paola Borri (Invited author), N. N. Ledentsov (Invited author), D. Bimberg (Invited author)

    Research output: Contribution to journalConference articleResearchpeer-review


    We have produced GaAs-based quantum-dot edge-emitting lasers operating at 1.16 mu m with record-low transparency current, high output power, and high internal quantum efficiencies. We have also realized GaAs-based quantum-dot lasers emitting at 1.3 mu m, both high-power edge emitters and low-power surface emitting VCSELs. We investigated the ultrafast dynamics of quantum-dot semiconductor optical amplifiers. The dephasing time at room temperature of the ground-state transition in semiconductor quantum dots is around 250 fs in an unbiased amplifier, decreasing to below 50 fs when the amplifier is biased to positive net gain. We have further measured gain recovery times in quantum dot amplifiers that are significantly lower than in bulk and quantum-well semiconductor optical amplifiers. This is promising for future demonstration of quantum dot devices with high modulation bandwidth
    Original languageEnglish
    JournalProgress in Biomedical Optics and Imaging - Proceedings of SPIE
    Pages (from-to)130-140
    Publication statusPublished - 2002
    EventSemiconductor Lasers and Optical Amplifiers for Lightwave Communication Systems - Boston, MA, USA
    Duration: 1 Jan 2002 → …


    ConferenceSemiconductor Lasers and Optical Amplifiers for Lightwave Communication Systems
    CityBoston, MA, USA
    Period01/01/2002 → …


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