Controllable nonlocal behaviour by cascaded second-harmonic generation of fs pulses

Morten Bache, Ole Bang, Wieslaw Krolikowski, Jeffrey Moses, Frank W. Wise

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Second-harmonic generation (SHG) of ultra-short pulses can act as a prototypical nonlocal nonlinear model, since the strength and nature of the temporal nonlocality can be controlled through the phase-mismatch parameter. The presence of a group-velocity mismatch namely implies that when the phase mismatch is small the nonlocal response function becomes oscillatory, while for large phase mismatch it becomes localized. In the transition between the two regimes the strength of the nonlocality diverges, and the system goes from a weakly nonlocal to a strongly nonlocal state. When simulating soliton compression to few-cycle pulses in the cascaded quadratic soliton compressor, the spectral content of the full coupled SHG model is predicted by the nonlocal model even when few-cycle pulses are interacting.
    Original languageEnglish
    Title of host publicationFirst Mediterrenean Photonics Conference
    EditorsA. Cutolo, M. N. Armenise, R. Ramponi
    Place of PublicationItaly
    PublisherEdizioni Giorgio Lieto
    Publication date2008
    Pages197-199
    Publication statusPublished - 2008
    EventFirst Mediterrenean Photonics Conference - Italy
    Duration: 1 Jan 2008 → …
    Conference number: 1

    Conference

    ConferenceFirst Mediterrenean Photonics Conference
    Number1
    CityItaly
    Period01/01/2008 → …

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