Accurate switching intensities and length scales in quasi-phase-matched materials

Ole Bang, Torben Winther Graversen, Joel Frederick Corney

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We consider unseeded typeI second-harmonic generation in quasi-phase-matched quadratic nonlinear materials and derive an accurate analytical expression for the evolution of the average intensity. The intensity- dependent nonlinear phase mismatch that is due to the cubic nonlinearity induced by quasi phase matching is found. The equivalent formula for the intensity of maximum conversion, the crossing of which changes the one-period nonlinear phase shift of the fundamental abruptly by p , corrects earlier estimates [Opt.Lett. 23, 506 (1998)] by a factor of 5.3. We find the crystal lengths that are necessary to obtain an optimal flat phase versus intensity response on either side of this separatrix intensity.
    Original languageEnglish
    JournalOptics Letters
    Volume26
    Issue number13
    Pages (from-to)1007-1009
    ISSN0146-9592
    DOIs
    Publication statusPublished - 1 Jul 2001

    Keywords

    • QUADRATIC MEDIA
    • SOLITARY-WAVES
    • SOLITONS

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