Research Of All-Optical Metal Switch Based On Kerr Effect

With the development of all-optical networks,the demand for highly integrated all-optical devices is increasing,and nanoscale optical devices become the key to solve this problem.The light-controlled optical switch based on Kerr effect has become an important optical device in the all-optical network.All-optical switch with various functions is capable of wavelength transform,wavelength matching,demultiplexing clock extraction and other critical and basic communication technologies.We are going to design two all-optical switches which is high-speed,smaller and lower power based on surface plasmon polaritons and Kerr effect,and we are going to extend the switch to an optical splitter.Based on the characteristics of the propagation of light waves by surface isoexcitons,this paper makes an in-depth study on the propagation of surface isoexcitons by Kerr intensity regulation,and designs two function-specific and interrelated all-off switches and an optical splitter based on all-optical switch.The study consists of the following three parts:1.Design of basic all-optical switch structure based on metal waveguide structure,realize the function of the light proactive closed.The structure of the resonator in the metal waveguide structure is changed,the structural parameters of the optimal extinction ratio are explored,the necessary data are obtained by FDTD method,and the three important performance indexes of all-optical switch,extinction ratio,pump power and response time,are analyzed and discussed.2.Performance tuning and function expansion based on basic all-optical switch,realize the function of the light proactive opened.To optimize the structure of the resonant system of the basic all-optical switch proposed in 1 and change the propagation mode of the surface equiexciter in the resonator cavity,the purpose is to reduce the pump optical power required by the switch excitation and expand the switch function,and to design an all-optical switch structure that can actively open the optical path.3.Optical path separator based on basic all-optical switch function expansion.Combined with the structure and function of the two switches in 1 and 2,the structure of the resonant cavity in the waveguide is changed,and the resonant mode in the resonant cavity is changed.This enables the optical path sorter to actively change the output path of the optical signal.Based on among researches,we design two different optical switch which have the high-speed,small in size and simple advantages.In addition,we expand the function of the optical switch,design and proposal an multifunction and excellent performance optical splitter.We reduce the pump light power greatly in our research,and this research make it suitable for applications in highly integrated high-speed optical circuits.