Related Research In 160Gbit/s OTDM Transmission Technology

High speed and long distance optical fiber communication systems faced with the increasing problems of optical signal to noise ratio reducing, polarization mode dispersion, effect of nonlinearity combined with dispersion, especially 160Gbit/s ultra-high-speed system to be increased in the transmission capacity and distance. These issues affect the system in transmission performance as a major factor. This paper research the impact of these factors related with combineing Professor Tangjun Li (my instructor) preside the national 863 Project "160Gbit/s of a multi-pump fiber optical transmission technology" (2007AA01Z258).Application of all-optical amplifiers let the loss would no longer be a major factor that limited optical communication transmission, but I believe that it need to consider it been faced with ultra-high-speed long-distance transmission, especially the polarization effects caused by polarization dependent loss. This paper analyzes the optical link loss, the device loss and polarization dependent loss, proposes the management of location optimization for EDFA and the loss program of inhibition for system.In the 160Gbit/s OTDM transmission systems, studyed PMD theoretical, PMD monitoring and PMD compensation. Analyzed polarizer polarization scrambling, PMD compensator devices and delay lines. Executed experiments for fiber PMD, device PMD and partial correlation of polarization scrambling, analysis experimental results, and provide related basic research for PMD compensation. Studyed the mothed of inhibition for PMD, struggled to achieve high-speed, simple, practical techniques for PMD compensation. Explored the dynamic PMD compensation by joining the PMD simulator in the system.Analysis nonlinear affect of high-speed transmission systems through Optisystem simulation. We found that nonlinear closely related to the factors such as types of transmission fiber, code type, power into fiber, transmission rate and dispersion by analysising the results of the simulation.Dispersion management techniques can be used to optimize the distribution of dispersion to avoid dispersion, inhibiting non-linear, so it effectively improve system performance. It is an effective way to improve the quality of long-distance optical communication. Research dispersion management technology for high speed and long distance optical fiber communications, put forward feasible dispersion management, and achieve 100km dispersion and dispersion slope compensation in high speed optical time-division multiplexing system. "90km ordinary single mode fiber and 10km dispersion compensation fiber," make up the system compensation, and the system can be achieved to compensate for accumulated dispersion and dispersion slope. It can be realized error-free transmission judging from the effects of compensation.