The Research Of Ternary Optical Fible Communication Principle And The Design Of Digital Circuit System

In this thesis, the principle of polarized light wave transmit in optical fiber is researched, i.e. principle of ternary optical fiber communication is researched. Based on the researches, the construction of ternary codes optical end machine and 3B2T optical end machine used in two-state fiber net are designed. The construction and component of circuits in 3B2T optical (called sign converter circuit -SCC) are designed particularly, including: the clock synchronization module, the data synchronizing, code converting module, frame managing module and error exam and managing module. Moreover, based on ternary optical fiber communication, the principle of four-state optical communication and the practical method of Polarization-Division Multiplexing are put forwarded.The research achievements that have been obtained in this paper can be summarized as follows:l.The calculating method of relay distance of ternary optical fiber communication system are researched, and a calculating equator is provided. The four-state optical communication principle is established, and the encoder and decoder are designed.2. The construction of ternary codes optical end machine and 3B2T optical end machine are designed.3. Some clock synchronizing resource of SCC used in SDH and PDH is researched. The clock obtaining practical circuit in approximately synchronization and clock circuit about symbol synchronization are designed(realized one circuit); The three controlling circuits with fast and low clock in code speed adjust technique are designed.4. The circuit of assembling frame and splitting frame based on RAM and FIFO are designed(realized frame synchronization). The two 3B4B converting circuits are designed(realized one circuit). The NRZ, RZ, Manchester code converting circuits are designed.5. The three methods of resolving slippage code problem are put forwarded and the circuits are designed.6. The theoretics of Flip-Flop anomalous property is perfected, and the oscillatory state of Flip-Flop is analyzed and the oscillatory frequency calculating equator is provided; The self-adapting data synchronizer practical circuit with 0 error rate is designed ,which can be used to resolve the problem of data synchronizing.The data synchronizer in common use is realized.