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Injection seeding of lasing in microdroplets.

J R Popp, M H Fields, R K Chang

    Optics Letters
    |February 1, 1997
    PubMed
    Summary

    Injection seeding enhances lasing intensity in dye-doped microdroplets. This technique boosts specific modes but can suppress others due to competition, impacting microdroplet laser performance.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Microdroplets can act as resonant cavities for light.
    • Dye-doped microdroplets exhibit lasing phenomena.
    • Controlling lasing modes in microcavities is crucial for applications.

    Purpose of the Study:

    • To investigate the effect of injection seeding on lasing in dye-doped microdroplets.
    • To analyze mode competition and intensity enhancement.
    • To explore the influence of droplet size on seeding effectiveness.

    Main Methods:

    • Achieving injection seeding of lasing in microdroplets of varying sizes (approx. 20-µm and 35-µm radius).
    • Utilizing dye-doped microdroplets as gain media.
    • Observing and analyzing the resulting lasing spectra and intensities.

    Main Results:

    • Successful injection seeding demonstrated in both small and large microdroplets.
    • Seeding effectively enhanced the intensity of a specific lasing mode.
    • Mode competition between the seeded and unseeded modes was observed, suppressing some unseeded modes.

    Conclusions:

    • Injection seeding is a viable technique to control and enhance lasing in microdroplets.
    • Droplet morphology and mode overlap significantly influence the outcome of injection seeding.
    • Understanding mode competition is key to optimizing microdroplet laser design.

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