Broadband single-transverse-mode fluorescence sources based on ribs fabricated in pulsed laser deposited Ti: sapphire waveguides

C. Grivas, T.C. May-Smith, D.P. Shepherd, R.W. Eason, Markus Pollnau, M. Jelinek

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    Active rib waveguides with depths and widths varying from 3 to 5 μm and from 9 to 24 μm, respectively, have been structured by $Ar^{+}$-beam etching in pulsed laser deposited Ti:sapphire layers. Losses in the channel structures were essentially at the same levels as the unstructured planar waveguide host, therefore suggesting that there is no significant additional contribution to loss from the rib-fabrication procedure. Measurements of the beam-propagation factors, $M^{2}_{x}$ and $M^{2}_{y}$, indicate single-transverse-mode fluorescence emission. The fluorescence output power was in the order of 300 μW when the structures were pumped by a 3-W multiline argon laser. These characteristics make the rib structures suitable as light sources for optical coherence tomography applications and facilitate their coupling to the optical fibre interferometers of such systems.
    Original languageUndefined
    Article number10.1007/s00339-004-2716-9
    Pages (from-to)1195-1198
    Number of pages4
    JournalApplied physics A: Materials science and processing
    Issue number4-6
    Publication statusPublished - 26 Sept 2004


    • IOMS-APD: Active Photonic Devices
    • IR-61949
    • EWI-11151

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