Transmission Performance Of 100 Gb/s Spectral Amplitude Code(SAC) Label Switching System

As the demand of optical communication market grows, the requirement of technology of optical communication network is also increasing. On one hand, people are increasingly paying attention to the development of optical label technology, hoping to realize all optical communication networkby avoid optic-electro-optic conversion processto reduce the construction cost and network transmission delay. On the other hand, high rate, wide bandwidth, long transmission distance of transmission technology is also another research field of international scholars.Under this background, the transmission properties of the 100 Gb/s spectrum amplitude code(SAC) label switching system was studied, as well as SAC optical label, and the basic principle of polarization multiplexing technology. We built 100 Gb/s polarization-division-multiplexed(PDM)-DQPSK/SAC label switching network transmission system, and then analyzed and optimized the system structure in optical simulation software. In this paper, the main research contents include:(1) Through reading about optical labels and polarization multiplexing technology papers, the paper summarized the research progress and development trend of SAC optical labels and polarization multiplexing technology.(2) Introduced several kinds of common optical label technology principle, and analyzed the key technologies of SAC optical tag system in detail, including the SAC label principle, producing and label identification. Then this paper deeply analysed the coherent frequency sweep detection principle, and its system structure, the results show that optical sweep frequency detection method can effectively identify the SAC label.(3) Introduced the modulation technology and multiplexing technology of a high-speed transmission, and studied the polarization multiplexing technology, including several common expressions of the polarization, and the effects of PMD and PDL for orthogonal polarization optical signals. Then coherent detection of polarization multiplexing is introduced, as well as the principle and key technologies of direct detection of polarization multiplexing technology. And then we compared and analysised these two methods. The simulation results show that thereceiving performance of direct detection of polarization multiplexing technology is a little better than coherent detection.(4) According to the previous theories and analysis, we built a 100 Gb/s polarization-division-multiplexed(PDM)-DQPSK/SAC label switching system in simulation, including the label’s and payload’s generation module, the transmitting module, the label’s and payload’s demodulation module. And then analyzed and optimized the influence of the various components and parameters of the system, including the mutual influence between payload and label. Finally this paper studied the transmission characteristics of the optimized label switching system, and the long distance transmission performance. The results show that in optimized label switching system, label and payload both can be received well.