Integrated lasers in crystalline double tungstates with focused-ion-beam nanostructured photonic cavities

F. Ay, I. Iñurrategui, D. Geskus, S. Aravazhi, M. Pollnau

    Research output: Contribution to journalArticleAcademicpeer-review

    12 Citations (Scopus)

    Abstract

    Deeply etched Bragg gratings were fabricated by focused ion beam (FIB) milling in KGdxLu1-x(WO4)2:Yb3+ to obtain photonic cavity structures. By optimizing parameters such as dose per area, dwell time and pixel resolution the redeposition effects were minimized and grating structures more than 4 µm in depth with an improved sidewall angle of ~5 degrees were achieved. Fabry-Perot microcavities were defined and used to assess the optical performance of the grating structures at ~1530 nm. An on-chip integrated laser cavity at ~980 nm was achieved by defining a FIB reflective grating and FIB polished waveguide end-facet. With this cavity, an on-chip integrated waveguide laser in crystalline potassium double tungstate was demonstrated.
    Original languageEnglish
    Pages (from-to)423-430
    Number of pages8
    JournalLaser physics letters
    Volume8
    Issue number6
    DOIs
    Publication statusPublished - Jun 2011

    Keywords

    • Crystalline potassium double tungstate
    • Optical waveguides
    • Integrated cavity
    • On-chip integrated laser
    • Waveguide laser
    • Focused ion beam nanostructuring
    • IOMS-APD: Active Photonic Devices
    • n/a OA procedure

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