Full-Wave Comparison of Z-cut and X-cut Lithium Niobate (LiNbO3) Electrooptic Modulators Using Finite Element Method
نویسندگان
چکیده
In this study we compare the relative merits of Z-cut and X-cut lithium niobate (LN) electrooptic modulators. The finite element method (FEM) has been used to implement a full wave analysis of the two structures and determine the microwave effective index Nm, the characteristic impedance Zc, the microwave losses αc and the half wave voltage VπL, operating at frequency range from 0.1 to 100GHz. Modelling of the diffusion profile of the optical waveguides has also been presented. The aim of the comparison of the two devices was to determine which device exhibit lower drive voltage at a high frequency operation.
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