The Design Of Bandwidth-tunable Micro-ring Resonater Based On Slot Waveguide

With the development of integrated optics,the ultra-compact bandwidth tunable photonic devices are playing an increasingly role.The high-index-contrast in silicon-on-insulator(SOI)waveguides allows small bending radius with low propagation losses,which leads to high density integration of micro-photonic devices.Micro-ring resonator(MMR)is regarded as a versatile component in a wide range of applications such as modulator,wavelength division multiplexing filter,wavelength converter and switch etc.In this paper,the physical characteristic of micro-ring resonator is deeply studied.Besides,on the basis of the theoretical analysis of slot waveguide,bandwidth tunable functionality and miniaturization goals can be achieved.The main work includes:Firstly,deeply analysis micro-ring resonator's various physical characteristics,especially its wavelength sensitivity characteristics.Secondly,the theory of slot waveguide is fully studied and a multi-slab based physical model is set up for a general slot waveguide.With this model,some properties and application conditions of it are analyzed and discussed.Finally,we propose a bandwidth tunable micro-ring resonator based on the slot waveguide,whose material with high refractive index difference results in slit effect.While the bandwidth of tunable micro-ring resonator resonance with different light patterns.At last a bandwidth tunable and compact device can be achieved.