The influence of cooling rate on the refractive index of proton-exchanged z-cut LiTaO3 waveguides has been investigated. After short annealing at about 240 degrees C, the waveguide mode indices of as-exchanged and annealed samples are different for quick and slow cooling. A hypothesis explaining this effect by assuming a diffuse phase transition in the protonated crystal lattice is given. The possible changes in the macroscopic parameters responsible for the index differences are analysed.

The influence of the cooling rate on the stability of z-cut H:LiTaO3 waveguides

Armenise, M. N.;Passaro, V. M. N.
1997-01-01

Abstract

The influence of cooling rate on the refractive index of proton-exchanged z-cut LiTaO3 waveguides has been investigated. After short annealing at about 240 degrees C, the waveguide mode indices of as-exchanged and annealed samples are different for quick and slow cooling. A hypothesis explaining this effect by assuming a diffuse phase transition in the protonated crystal lattice is given. The possible changes in the macroscopic parameters responsible for the index differences are analysed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/613
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