Time Jitter And Interaction Control In Soliton Transmission With Super-Gaussian Sliding-frequency Filters

In this dissertation, we have introduced the fundamental theory for soliton's propagation in optics fiber, and the effects of noises induced by amplifiers on the propagation of solitons in optics fiber. The important effect is that noise can cause timing jitter, which largely limits the single-channel bit rate and increases the error rate. One way to reduce timing jitter is the use of narrow-band frequency-guiding filters periodically distributed along the transmission line. Recently, we propose that super-Gaussian sliding-frequency filters are better in controlling timing jitter than the conventional filters usually in the form of Fabry-Perot etalons. By solving the nonlinear Schrodinger equation with perturbation method and computer simulations, we have demonstrated that super-Gaussian sliding-frequency filters are more effective to reduce timing jitter than conventional sliding-frequency filters without sacrificing the signal-to-noise ratio. We have also demonstrated that the interactions between optical fiber solitons can be fully suppressed by super-Gaussian sliding-frequency filters. Computer simulations have shown a good agreement with theory. Super-Gaussian sliding-frequency filters can be implemented with holographic fiber gratings.