Optical losses in metal/SiO 2 -clad Ti:LiNbO 3 waveguides
- 18 August 1983
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 19 (17) , 659-660
- https://doi.org/10.1049/el:19830449
Abstract
We present measured excess loss resulting from electrode overlays for both TE and TM polarisations as a function of SiO2 buffer layer thickness for Ti:LiNbO3 strip waveguides at λ = 1.32 μm. We find there is negligible excess loss to the TE mode with no buffer layer and that the excess loss to the TM mode can be essentially eliminated with a SiO2 layer only 700 Å thick. A passive polariser with ̃ 1.5 dB fibre-waveguide-fibre insertion loss and > 13 dB extinction ratio is also demonstrated.Keywords
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