Realization of on-chip lasers in crystalline double tungstate waveguides using focused-ion-beam nanostructuring

F. Ay, D. Geskus, S. Aravazhi, Markus Pollnau

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    Abstract

    We report our recent work on obtaining on-chip lasers in crystalline double tungstate waveguides using focused-ion-beam (FIB) nanostructuring. Photonic cavity structures were defined by forming deeply etched Bragg gratings in KGdxLu1-x(WO4)2:Yb3+ using FIB milling. The FIB milling procedure was optimized and gratings more than 4 μm in depth with an improved total sidewall angle of about 5 degrees were achieved. Their optical performance was assessed at 1530 nm in Fabry-Pérot microcavities realized on the waveguides. 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 for the first time.
    Original languageUndefined
    Title of host publication8th Nanoscience and Nanotechnology Congress, Nano-TR-VIII
    Place of PublicationAnkara, Turkey
    PublisherHacettepe University
    PagesPaper OP-113
    Number of pages2
    ISBN (Print)not assigned
    Publication statusPublished - Jun 2012

    Publication series

    Name
    PublisherHacettepe University

    Keywords

    • METIS-287891
    • EWI-21968
    • IOMS-APD: Active Photonic Devices
    • IR-80655

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