Resonant modulation

Abstract
Devices that offer fast modulation and switching of light waves currently attract widespread research efforts for potential applications in high-speed signal processing. The guided-wave techniques of integrated optics have demonstrated the capability to achieve drive power/bandwidth levels of a few milliwatts per gigahertz modulation bandwidth. Most recently, efforts have been concentrated on electro-optic travellingwave configurations (Alferness et al . 1983; Gee & Thurmond 1983; Cross et al . 1984) to achieve operation at higher frequencies with higher bandwidths than are usually obtainable from lumped-electrode devices, wherein the dominant restriction of the speed of operation is the RC constant associated with electrode charging and discharging. Here, we discuss the potential merits of an alternative approach, which employs resonant optical waveguide cavities.

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