Very Short Reach Optical Interconnect Optical System

Data rates are continuing to increase for board to board and chip to chip interconnections for terabits switches, multiprocessor computer, and hight-end servers. The increase in individual line rates and bandwidth density drives the need to replace cooper interconnects with optical interconnects, because of bottlenect of cooper interconnections such as more loss and signal attenuation.The main advantages of optical interconnections are larger bandwidth density, less susceptibility to electromagnetic interference (EMI), and potentially lower power dissipation,depending on the data rate and link length. Optical interconnections technology, in the form of fiber optics, has been used for decades in long-distance applications, and in recent years has made inroads into shorter-distance applications, such as communications between servers in a data center. While still some years from viability in a production environment, some technologies must be solved such as low cost package. For that, the optical circuits technologies, including waveguides and couping, are mainly focused on in my research. In my work, used of FD-BPM and a new effective index method, a single mode waveguide based on SOI is designed and the single mode condition of waveguide based on SOI is researched and proved also. Besides that some improved MMI splitters based on SOI are also done, optimized the main parameters of MMI spitter, greatly ungrading the performances of MMI splitters based on SOI, such as loss and uniformity of power.Waveguide fabrication processes are mentioned in the thesis. The optical coupling efficiency is very important for optical interconnections. Used of overlap integral, the mathematic models are established for analyzing coupling efficiency in the job, which are made use of to analyse the coupling efficiency between optical source and waveguides directly, and the optical coupling efficiency with lens.Farther, a mathematic model, which is used to research the optial coupling efficiency between source and waveguide with asymmetric hyperbola microlens end is fisrt proposed and an optimum asymmetric hyperbola microlens is designed to improved coupling efficiency in optical interconnections.