Epitaxial layers of KY1−x−yGdxLuy(WO4)2 doped with Er3+ and Tm3+ for planar waveguide lasers
✍ Scribed by Western Bolaños; Joan J. Carvajal; Xavier Mateos; Maria Cinta Pujol; Nicky Thilmann; Valdas Pasiskevicius; Ginés Lifante; Magdalena Aguiló; Francesc Díaz
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 540 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0925-3467
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✦ Synopsis
Here we show the results we obtained in the fabrication of planar waveguide lasers based on monoclinic double tungstates doped with Er 3+ and Tm 3+ . We have successfully introduced these ions into the lattice matched KY 0.59 Gd 0.19 Lu 0.22 (WO 4 ) 2 epitaxial layers grown on KY(WO 4 ) 2 substrates without loss of optical quality and keeping a high refractive index contrast between the epitaxial layer and the substrate. We characterized the waveguiding properties of these epitaxial layers at k = 632.8 nm by dark modes spectroscopy, and we showed that these waveguides can support several TE and TM modes. Spectroscopic characterization of the active lanthanide ions in these crystals is also presented.