Research And Realization On Key Technology In All Optical Network

With the development of data service, optical transmission has played an important role in the backbone communication system. But the switching of the system is implemented in electronic domain, which means signal should be converted into electronic format for switching and converted back into optical format subsequently resulting "electronic bottleneck" which is the most obstacle to optical communications networks. Meanwhile all-optical network can break the restriction of the electronic switching and it is devised for the users to exploit the enormous speed of optics. So All-optical network is regarded as the key technology to the next generation network (NGN), and great research interesting has been attracted in it. Under this research background we conduct a deep investigation into the theoretical and experimental researches about optical-circuit-based all-optical network and the work is supported by the National High Technology Development Program of China (863 program) and National Natural Science Foundation of China. Our researches include ultra-long haul optical transmission, 40Gbps transmission in CFBG-based system, and novel technique to all-optical clock recovery, basic theoretical and experimental research on all-optical network. And the main achievements of the thesis are listed as bellows: A 2015km 12×10Gbps transmission with error-free was implemented in the NRZ-employed system where dispersion was compensated by the chirped fiber Bragg grating (CFBG). And even the low power penalty after 2560km transmission with the structure mentioned above was achieved if RZ and CSRZ format were employed. The transmission experiment conducted in this paper breaks through the standpoints in many papers that it's difficult to prolong the error-free transmission length above 1000km without electronic repeater. It is the first time that, to the best of our knowledge, the advanced modulation format is applied in CFBG-based system where ultra long haul transmission with perfect performance is achieved. The causation of the nonideal characteristic of the chirped fiber Bragg grating was expatiated. The impact of the group delay ripple (GDR), reflectivity ripple...