Basic Research Of The Organic Polymer Optical Waveguide Delay Line

Polymeric material is very promising in fabricating integrated optical waveguide devices. Polymeric optical waveguide has become the hotspot because polymeric material can offer a series of merits such as easy integration, rapid response, low cost and so on. The polymeric optical delay-line is particularly attractive in the field of optically controlled phased array antennas. This dissertation is concentrated on polymeric waveguide, including material characteristic , numerical simulation, electrode optimization, fabrication and so on.The development of polymeric photoelectron apparatus is introduced first, and then the author summarizes the status quo of polymeric optical delay-line ,expounds the material characteristic and designs the structure of the delay-line.It is necessary to simulate ,design and optimize optical waveguide device with effective and accurate tools. Variational-Effective index method and Finite difference beam propagation method(FD-BPM) are both practicable waveguide simulation tools. The Variational-Effective index method is based on mixing the variational method(VM) and the effective index method(EIM),it can be used with very accuracy to simulate the field distribution. The finite difference beam propagation method(FD-BPM) can simulate the performance of the waveguide accurately. Single mode rid waveguide structure parameters are derived by Variational-Effective index method; FD-BPM and its Transparent Boundary Condition(TBC) are concerned, and then the EIM used to transfer a 3D waveguide to 2D waveguide is analyzed; finally we summarize the characteristic of the Y branch. These simulation results would lay an foundation for our experiment.The design of electrode structure is another key technology .Based on a free SC tool from University of Delaware, the author writes programs to simulate the electrode structure. The results show that the thickness and the width of the electrode ,electrode gap and the thickness of upper cladding have different effects on microwave effective index, characteristic and conductor loss. Compromising structure must be adopted in practical design to gain perfect performance.