Aging and structure-change processes in proton-exchange waveguides in lithium niobate crystals

Аuthors

Zhundrikov A. V., Kichigin V. I., Petukhov I. V., Shevtsov D. I.

Perm National Research Polytechnic University, 15, Bukirev str., Perm, 614990, Russia

Abstract

Time variations of the refraction index of proton-exchanged guiding layers on lithium niobate (X cut), which reflect slow aging (stabilization) processes in waveguides, were studied by mode spectroscopy technique. Structural changes in channel proton-exchanged waveguides after long-term stabilization (3 years) were studied by wet chemical etching of proton-exchanged layers and 3D profilometry.

Keywords:

optical waveguide, lithium niobate, proton, exchange, aging of proton-exchanged waveguides.

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