Abstract

It is well known that the frequency response and the drive power requirement of a traveling-wave modulator (or switch) are determined by the velocity difference between optical and microwave radiations, the impedance, the microwave propagation loss, and the electrode length as well as the optical parameters of the device.¹ The impedance and the loss of the asymmetric coplanar strip (ACPS) and the coplanar waveguide (CPW) transmission lines on LiNbO₃ without the dielectric buffer layer have previously been reported.² However, an analysis of the effects of the buffer layer on microwave characteristics has not yet been available in the literature.

© 1990 Optical Society of America