Design Of Polymer Waveguide Optical Interconnection Coupler

Since the ancient times, human sending messages by various means. From the ancient balefire communication, flying pigeon book to modern telegraph, telephone and computer communications, human demand more and more for information. The current communication within short distance is by way of electrical interconnection. With the improvement of integration, the limit of electrical interconnection itself is more and more prominent. It exists signals crosstalk, clock signal skew, electromagnetic interference, high integration density and high power consumption, etc. this problems make electricity interconnect technology become an important bottleneck restriction of system performance. Optical interconnection technology between the chip and chip has low loss, high bandwidth, large capacity, no crosstalk, resistance electromagnetic interference etc. improving the transmission rate and interconnection reliability very well, making the optical interconnection becomes an effective way to solve electrical interconnection problems.In this dissertation, it mainly studies optical interconnection between chips in the printed circuit board. First of all, the transmission process of light in the planar waveguide and rectangular waveguide and the mode distribution of the light transmission in the waveguide are analyzed in theory. According to the models to judge the situation of the light transmitted in the waveguide, and to measure transmission loss.Next, on the basis of the research achievements in optical interconnection aspects in recent years, by means of improving the existing structure, a new structure is proposed. The research on the proposed structure mainly includes the following three parts. Firstly, design and production of rectangular waveguide, the cant reflect, and cylindrical coupler are presented Rectangular waveguide through the mask exposure and development process to implement, it can be precisely controlled by the size of the waveguide through the mask design. The optical test of rectangular waveguide and calculation of waveguide loss can get good results, meeting the requirements of the communication loss. Secondly, the design of incline angle and coating. The reflection structure is realized directly in the rectangular waveguide in this thesis, it has a great improvement comparing with the previous structure, in this way, transmission and reflection are all realized on the same waveguide, which reduces the loss between them because of the presentation of the transition structure, at the same time, cant coating, the influence of different material and different thickness of reflection are investigated. Thirdly, design of the coupler is presented. Due to the distance of vertical cavity surface emitting laser and the waveguide will affect the size of the energy of light coupled into the waveguide, that is to say, it can produce loss, the innovation of this dissertation is to design a cylindrical coupler whose height can be controlled, so the distance between the laser and the waveguide can be adjusted, which makes the optical interconnection device has the advantages of simple design and low losses. It has a great significance about the application of optical interconnection.Finally, making the optical test on the above structure, to analyze the results and calculate transmission loss, insertion loss coupling loss cant and the reflect efficiency of waveguide bevel. Evaluating the advantages of adding the Cylinder coupling device, and then putting forward the improved scheme to deficiencies.