D.F. Zaitsev - Dr. Sc. (Eng.), Main Designer, Moscow State University of Information Technologies, Radio Engineering and Electronics (MIREA), Head of Laboratory, JSC «CRET». E-mail: zaysev@yandex.ru N.G. Pavlov - Post-graduate Student, Moscow Institute of Physics and Technology (State University), Research Scientist, Russian Quantum Center (Skolkovo). E-mail: ngpavlov@mail.ru N.M. Kondratev - Research Scientist, Russian Quantum Center (Skolkovo). E-mail: noxobar@mail.ru M.L. Gorodetsky - Dr. Sc. (Phys.-Math.), Head of Laboratory, Russian Quantum Center (Skolkovo), Professor, Faculty of Physics, Lomonosov Moscow State University

Radio frequency (RF) systems, cellular networks and other various communication systems require devices capable of receiving, converting and processing signals in microwave bands. A broad palette of devices was developed recently for converting RF signals directly to optical domain. This presents all advantages of optical communication channels, allowing to transmit data securely with high rates, low loss, low power consumption. Electro-optic modulators based on interaction of optical and RF fields in high-Q nonlinear optical resonators with whispering gallery modes (WGM) provide a promising platform for microphotonics. Resonators with whispering gallery modes are widely used for various applications. Small size and high density of the optical field in microcavities allow strong electro-optic interaction in resonators made of traditional nonlinear optical crystals, with proper selection of the optical modes and configuration of RF field. We present a theoretical analysis and numerical simulations of electro-optic double resonant modulator based on interaction of fundamental whispering gallery modes with a radio frequency field in a dielectric microdisc made from electro-optical material. Models of the modulator in 2D and 3D are developed and compared. Both optical and RF fields are simulated using finite element method. The magnitude of the effect in such system may be maximized with optimum configuration of a microstrip resonator used for RF coupling.

 

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