High Speed Optical Modulator for Broadband Optical Networks Based on Superconducting Electrodes

摘要

A full wave analysis of a high speed LiNbO3 optical modulator for broadband optical networks based on superconductor electrodes is addressed. The analysis is based on the application of the transverse resonance technique. An equivalent circuit of the travelling wave superconductor coplanar line is modeled. Generalized trial quantities are introduced as virtual adjustable sources in the equivalent network representation of boundary conditions. It is shown that equivalent network including the two port and generalized trial quantities is more powerful and efficient than the usual surface impedance approximation. The design and performance of a LiNbO3 optical modulator have been investigated. Numerical calculations of the attenuation constants of superconducting transmission lines illustrate that the performance of the optical modulator can be much superior to that using normal metals, with respect the band width/driving voltage.