Lu, Gd codoped KY(WO(4))(2):Yb epitaxial layers: towards integrated optics based on KY(WO(4))(2)

Codoping KY(WO(4))(2):Yb layers with optically inert Lu and Gd ions allows a large increase of the refractive index contrast with respect to KY(WO(4))(2) substrates. This paves the way for the realization of integrated optical circuits based on this very promising material. First riblike waveguide s...

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Bibliographic Details
Published inOptics letters Vol. 32; no. 5; p. 488
Main Authors Gardillou, Florent, Romanyuk, Yaroslav E, Borca, Camelia N, Salathé, René-Paul, Pollnau, Markus
Format Journal Article
LanguageEnglish
Published United States 01.03.2007
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Summary:Codoping KY(WO(4))(2):Yb layers with optically inert Lu and Gd ions allows a large increase of the refractive index contrast with respect to KY(WO(4))(2) substrates. This paves the way for the realization of integrated optical circuits based on this very promising material. First riblike waveguide structures have been fabricated and propagation losses below 1 dB/cm have been evaluated. A Y-junction with a splitting ratio close to 1:1 and additional losses of 1.4 dB has also been demonstrated.
ISSN:0146-9592
DOI:10.1364/OL.32.000488