Tunable on chip optofluidic laser

Avraham Bakal, Christoph Vannahme, Anders Kristensen, Uriel Levy

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    Abstract

    A chip scale tunable laser in the visible spectral band is realized by generating a periodic droplet array inside a microfluidic channel. Combined with a gain medium within the droplets, the periodic structure provides the optical feedback of the laser. By controlling the pressure applied to two separate inlets we can change the period of the droplet array. As a result, the lasing frequency is tuned over a broad spectral range. Using this configuration, we demonstrate wavelength tunability of about 70 nm and lasing threshold of about 15 μJ/mm2.
    Original languageEnglish
    Article number211105
    JournalApplied Physics Letters
    Volume107
    Issue number21
    Number of pages4
    ISSN0003-6951
    Publication statusPublished - 2015

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