Fe ions in proton-exchanged LiNbO3 waveguides
- 10 August 1992
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 61 (6) , 624-626
- https://doi.org/10.1063/1.107855
Abstract
The valence state of Fe in proton‐exchanged LiNbO3 optical waveguides is studied by electron paramagnetic resonance (EPR) and loss measurements. Starting from a fully reduced substrate showing no Fe3+ EPR signal, the exchange process induces a strong Fe2+→Fe3+ conversion within the guiding region. A new EPR line is also observed to peak at 1650 G for B perpendicular to C‐axis which is attributed to a new Fe3+ center. Losses (at 442 nm) are about forty times lower in the guide than in the reduced substrate.Keywords
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