Abstract:
This dissertation is aimed at the integration of a novel Magnetless optical waveguide isolator on a Silicon-on-Insulator platform. Optical isolation and non-reciprocal transmission have been raising significant interest in recent research. Optical nonreciprocity is essential in WDM technology in order to avoid backscattering of light to any of the input ports. In this dissertation to design the optical isolator, a novel technique has been entreated. The technique exerts the concept of Tesla- type fluidic valve in Electromagnetics. A mathematical correspondence between the mechanical wave and Electromagnetic wave has been witnessed through the simulation of similar Tesla-type structure both in fluid dynamics and Electromagnetics. Based on the results a modified Tesla-type structure is proposed utilizing few Micro-Ring Resonators. Simulations were carried out in order to identify the most promising design. Hence for single mode waveguide propagation, a novel optical nonreciprocal system has been obtained. Nonreciprocal isolation performance was observed in all simulated Structures. An isolation ratio of 24 dB has been obtained using the proposed structure having a footprint of about 20µm×20 µm in the DWDM range (1528nm- 1563nm). The results presented in this work in terms of performance and footprint show the technology is fitting for optical integration in CMOS technology.
