Design And Application Of Automatic Protection Of Partial Optical Within The High Risk Areas

Modern communications, especially modern military communications have high demands for quality and reliability of information transmission. In order to reduce the high maintenance costs and the huge losses caused by line breaking, the research on the exploration and application of optical fiber cable line automatic switching protection technology which is a simple, practical and economic communication protective and restoring technology is of a strong practical value.The existing domestic technology of optical fiber cable line automatic switching protection has existing limits such as, high production costs, large occupancy of cable resources, single application mode, poor flexibility. And it needs advanced plan before being built, but can not make use of the existing or waste optical fiber cable lines for partially modification. The paper puts forward the design idea that with the use of wavelength division multiplexing passive optical network, dual-routing or multi-routing automatic switching protection can be processed in optical communication line within the arbitrary breaking high-risk areas. Based on the full study and understanding of the theories and features of all-optical communication, weak light measuring and automatic switching protection, the paper conducted computer simulation analysis on the optical path of switching protective system and part of the detection and control circuits, and finished the design and implementation of the soft and hard wares of the detection and control circuits.According to the results of the computer simulating analysis and the debugging and analysis of the soft and hard ware programs, various indexes basically meet the design requirements.Finally, from the analysis of lower system power loss and reliability improvement ,the paper gives advices on further improvement.