Pulse delay measurements in cascaded quantum well gain and absorber media

Per Lunnemann Hansen, Mike van der Poel, Kresten Yvind, Jesper Mørk

    Research output: Contribution to journalJournal articleResearchpeer-review


    A tunable delay of ultrashort laser pulses in semiconductor waveguide structures are demonstrated in cascaded amplifying and absorbing semiconductor waveguides and compared with a single sectioned waveguide. The single sectioned waveguide shows a low transmission at the maximum delay. This is effectively avoided with the cascaded waveguide configuration, where it is demonstrated viable achieving a net pulse delay while maintaining a transmission of unity. For both type of devices, a pulse advancement is observed, at large pulse energies, that existing models are unable to account for.
    Original languageEnglish
    JournalI E E E Photonics Technology Letters
    Issue number6
    Pages (from-to)365-367
    Publication statusPublished - 2010

    Bibliographical note

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    • ultrafast optics
    • semi-conductor waveguides
    • quantum well devices


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