Rare-earth-ion-doped double-tungstate waveguides

Pollnau, M. (2007) Rare-earth-ion-doped double-tungstate waveguides. In: Proceedings of the European Materials Research Society Meeting 2007, Symposium C: Rare Earth ion doping for photonics: materials, mechanisms and devices, 28 May - 1 June 2007, Strasbourg, France.

PDF
Restricted to UT campus only: Request a copy
7Kb

Abstract:	It has been recognized that the monoclinic double tungstates KY(WO4)2, KGd(WO4)2, and KLu(WO4)2 possess a high potential as rare-earth-ion-doped solid-state laser materials, partly due to the high absorption and emission cross-sections of rare-earth ions when doped into these materials. Besides, their high refractive indices make these materials potentially suitable for applications which require optical gain and high power in integrated optics, with rather high integration density. This paper reviews the recent advances and presents our work at the Ecole Polytechnique Fédérale de Lausanne, Max-Born-Institute in Berlin, and University of Twente in Enschede towards the demonstration of KY(WO4)2 waveguide lasers and their integration on a chip. Thin layers of rare-earth-ion-doped KY(WO4)2 were grown on undoped substrates by liquid phase epitaxy. Optical waveguiding with propagation losses of 0.1-0.2 dB/cm was achieved. Recently, we have demonstrated KY(WO4)2:Yb3+ and KY(WO4)2:Tm3+ planar waveguide lasers at 1 μm and 2 μm, respectively. With the former, we have achieved 290 mW of output power and >80% slope efficiency. Channel waveguides have been prepared by reactive ion etching, light ion implantation, or femtosecond laser writing. Optical investigations of these channel waveguides are under way.
Item Type:	Conference or Workshop Item
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Integrated Optical MicroSystems (IOMS)
Link to this item:	http://purl.utwente.nl/publications/62077
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Show download statistics for this publication

Repository Staff Only: item control page

Metis ID: 245886