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

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Abstract

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, Mx2 and My2, 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.

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Authors and Affiliations

  1. Optoelectronics Research Centre (O.R.C.), University of Southampton, Highfield, Southampton, SO17 1BJ, UK

    C. Grivas, T.C. May-Smith, D.P. Shepherd & R.W. Eason

  2. Institute of Imaging and Applied Optics, Swiss Federal Institute of Technology, 1015, Lausanne, Switzerland

    M. Pollnau

  3. Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21, Prague 8, Czech Republic

    M. Jelinek

Authors
  1. C. Grivas
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  2. T.C. May-Smith
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  3. D.P. Shepherd
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  4. R.W. Eason
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  5. M. Pollnau
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  6. M. Jelinek
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Corresponding author

Correspondence to C. Grivas.

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PACS

42.70.Hj; 42.82.Et; 42.79.Gn; 81.15.Fg; 42.30.Wb

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Grivas, C., May-Smith, T., Shepherd, D. et al. Broadband single-transverse-mode fluorescence sources based on ribs fabricated in pulsed laser deposited Ti:sapphire waveguides. Appl. Phys. A 79, 1195–1198 (2004). https://doi.org/10.1007/s00339-004-2716-9

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  • DOI: https://doi.org/10.1007/s00339-004-2716-9

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