An analytic model of a Ti:LiNbO3channel waveguide has been developed to predict conveniently the coupling coefficient of directional couplers based on near-field intensity measurements. This model is compared to experimental results at wavelengths of 0.63 and 0.81 µm and indicates an accuracy of predicting coupling coefficients within a factor of 2 without prior knowledge of the fabrication parameters.
© 1985 Optical Society of America
Craig T. Mueller and Elsa Garmire, "Coupling characteristics of LiNbO3directional couplers," Appl. Opt. 24, 2846-2850 (1985)