Micro-resonator based photonic components in advanced optical communication systems

Silicon photonics opens up new possibilities for the realization of diverse photonic devices and components required for advanced optical communication systems. One of the key building blocks developed on silicon-on-insulator (SOI) wafer is the optical micro-ring resonator. In this invited talk we will consider the basic theory of optical micro-ring resonator and analyse the side-coupled integrated spaced sequence of resonators (SCISSOR) as well as the coupled resonator optical waveguide (CROW) with emphasis on realization of several optical functionalities such as filters, add-and-drop multiplexers, optical logic gates, power equalizer, ¿-converters, format converters, dispersion compensators etc. Finally, a step-by-step design approach will be presented for demodulation of both single-channel optical DPSK and three-channel optical DPSK using a CROW-type microresonator based band-pass filter .The impact of apodization on the designed band-pass filter has also been highlighted in terms of the improvement of the eye-opening of the demodulated DPSK signal.