Research On Characteristics Of EIT-like Spectrum For Coupled System Of Optical Micro-ring

In the study of optical waveguide,ever since the waveguide and micro-ring coupling have been introduced by some scholars,the micro-ring resonator has been paid more and more attention which possesses many advantages such as small dimension,simple construction,easy integration,high-Q-factor modes and so on.Micro-ring resonator with electromagnetic induction transparent(EIT)phenomenon has a great advantage in the application of optical filter,optical delay devic e,laser and many other optical integrated devices.Along with the realization of various structures,the theoretical study of the micro-ring resonator is gradually improved.Besides,in controllable micro-ring resonator optical experiments to observe EIT phenomenon,Regulating and controlling interaction within micro-ring should be considered.Therefore,this paper we will study the impact of the micro ring loss,coupled transmission and interactions within the coupling ring for electromagnetic induction transparent spectral transmittance characteristics.Details are as follows:In the first chapter,we introduce optical micro-ring cavity and EIT-like phenomenon.Contents include: classification of optical micro-cavities,historical review of micro ring resonator,the basic parameters of the micro-ring resonator and important applications of micro ring cavity in optical devices.To introduce simply EIT phenomenon and EIT-like phenomenon,and gives its main research methods.In the second chapter,the transmission spectrum characteristics of the lateral coupled micro ring are studied.The transmission spectrum and phase spectrum of one waveguide-double ring lateral coupling system are controlled by adjusting the loss and the transmission rate.Through the study,we find that the distance between the two extremes of EIT spectrum can be regulated by regulating the loss of ring.In order to obtain a better EIT spectrum,we should take the large ring loss and high transmission rate.In the third chapter,the co upled equations of the double ring resonator are analyzed.Transmission matrix and transmission spectrum are also derived,as well as the influence of various parameters on the shape of the transmission spectrum and the transparent window were simulated numerically.By changing the data,the transmission spectrum of EIT-like phenomenon is adjusted.In order to obtain a better EIT spectrum,we should take a large ring 3 loss and transmission rate.The influence of various parameters on the phase spectrum is also given.In the fourth chapter,the coupled equation of two waveguide-double ring coupled resonator is analyzed,and its transmission matrix and transmission spectrum formula are deduced.The shape of the transmission spectrum is simulated numerically.The shape of the transmission spectrum is observed with the change of the micro-ring loss,the transmission,the radius and interactions within the ring.We find that in order to obtain a wider range of EIT,we should take the smaller ring coupling,the larger ring loss and transmission rate.In the fifth chapter,through the analysis of the coupled equations of the double ring resonator,the transmission matrix and the transmission spectrum are derived,respectively,and two cases of single and double waveguide are studied.In the analysis of the transmission of the optical field,we find that the propagation of the field can be decomposed into a series of micro-ring systems.Therefore,it can be used to solve parallel situation by transfer matrix method of series micro-ring coupling system.The last chapter is the conclusion of this paper,and the prospect of the theory research of micro ring resonator.