Repositori URV

Identifier: TDX:942

Handle: https://hdl.handle.net/20.500.11797/TDX942

Authors:
Bolaños Rodríguez, Western

Abstract:
The successful combination of the advantages of the waveguide laser geometry and the spectroscopic properties of monoclinic double tungstates was confirmed in this work by the realization of planar and channel waveguide lasers activated with Tm3+. Planar waveguides activated with Er3+ and Tm3+ were fabricated by Liquid Phase Epitaxial growth (LPE) of KY1-x-yGdxLuy(WO4)2 single crystalline layers over KY (WO4)2 substrates. CW and Q-switch laser operation at 1.84 m were, for the first time, demonstrated using the lattice matched composition KY0.58Gd0.22Lu0.17Tm0.03(WO4)2 . Surface channel waveguides were fabricated by structuring the surface of the Er3+ and Tm3+-doped planar waveguides by means of standard UV-photolithography and Ar-ion milling. Buried channel waveguides were fabricated by a novel combination of LPE of the activated layers after structuring of the surface of the KY (WO4)2 substrates by Ar-ion milling. Mirrorles waveguide laser in CW regime was demonstrated using these buried channel waveguides.