Theory And Implementation Of Ternary Optical Computer's Decoder

As one of the key components of Ternary Optical Computer (TOC), decoder makes a good connection between TOC and the electronic computer. This means that through decoder, TOC can communicate and share information smoothly with traditional electronic computer. This is very important and helpful. For it may set the basis for the TOC in the applications such as in military, bioinformatics, information retrieval in large database and information security etc. which are beyond the capability of traditional electronic computer. Therefore, the research on the decoder with huge number of data bits promotes the further study and development of TOC, and has important theoretic significance and applied value.Using the intensity and polarization state of light to express tri-valued digit information, i.e., 1, 0, and -1, TOC is a kind of three-valued computer. The role of the decoder in TOC is to automatically analyze and interpret the state of light signal emitted from the arithmetic logical unit of TOC. Besides it also answers for converting the tri-state light signal into digit electron signal and translating the signals into its tri-valued digit.In this dissertation, the theory, design and engineering implementation method of the decoder have been studied and discussed systematically based on the theories about TOC, decrease-radix design and polarization optics, photoelectric conversion technology and embedded-system technology and so on. After solved some key issues, such as, determining the Tri-stated signal, photoelectric conversion, calibrating, binarizing image etc., a new practical prototype of the decoder was developed successfully. To demonstrate the decoder, decoding experiments for hundred-bit tri-valued logic optical operation are carried out based on the tri-valued hundred-bit optical logic experiment system. Experimental results show the theoretical model of the decoder is correct and the structure design is feasible. Besides, the results of the stress and randomized testing also show that the practical prototype of the decoder is highly reliable and stable.The main contributions of the dissertation are presented as follows:1. Through comparative analysis, we selected the method of determining the tri-stated optical signal based on division of amplitude method to construct the decoder of TOC.2. Present the structural model and design scheme of the decoder, and the working principle and supporting technique are elaborated.3. Develop a new practical hundred-bit decoder based on embedded microprocessor unit and CMOS digital image sensor.The dissertation introduced also some experiments demonstrating the validity and reliability of the decoder. The theory and technology of the decoder play an important role in constructing the applied experimental system of the thousand-bit TOC.