The New Modulation Formal Research Of Orthogonal Optical Label Switching

At present, the communication network consists of the optical transmission sub-network and electronic exchange sub-network. Between two sub-networks there are a lot of light/electricity, electricity/light interface adapter and rate-matching operation, reducing the network resource utilization and the network performance. Since the "electronic speed bottleneck" and " optical processing bottleneck," all-electrical networks and all-optical networks are not realistic. View of the current situation in the exchange of technology and devices level of development, mixed-use photoelectric packet switching-optical label switching is the next generation network development direction.Based on such a research background, focuses on the content of this article are as follows:1. we focus on the previous orthogonal optical label switching technology's classification, and analysis on the theory of the key devices (electro-absorption modulator, MZ modulator) of the orthogonal optical label switching and the modulation format (ASK, FSK, DPSK and DQPSK).2. Designing a 40-Gb/s DPSK/FSK orthogonal optical label switching system. According to simulate the system, we analyze the scheme of pre-compensation, post-compensation and the hybrid-compensation, obtaining the optimized length of dispersion compensation fiber. External modulator's payload extinction ratio was analyzed, and we optimize the modulator's payload extinction ratio. The transmission performance of the system is shown in the paper. At last, we get the key parameters which impact the performance of payload signal and label signal based on 40-Gb/s DPSK/FSK orthogonal label switching system.3. Proposing a new orthogonal modulation format based on the DQPSK/ASK orthogonal label switching system. Analyzing the key parameter's (label extinction ratio, laser line-width, receiver optical power, dispersion compensation scheme) influence on system performance.