Absorption loss and Kerr nonlinearity in barium titanate waveguides by Annina Riedhauser, Charles Möhl, Johannes Schading, Daniele Caimi, David I. Indolese, Thomas M. Karg, Paul Seidler

“…Using cavity-enhanced photothermal spectroscopy, we measure the absorption loss of BaTiO3 ridge waveguides at wavelengths near 1550 nm to be αabs = 10.9−0.4+5.8 dB m−1, well below the propagation losses due to other sources, such as scattering. …”
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