Characteristics And Application Of Nonlinear Optical Bistable Switching

The nonlinear optical bistable switching has considerable potentials in optical computation and optical communication fields, such as optical gate operations, signal reshape and regeneration, optical time-division demulplexing, optical memory, all-optical wavelength converter, etc. The reported results have shown that the bistable switching corresponds to infinite response time near the transition points, called as critical slowing-down effects. Also, the unstable states such as self-pulsation and chaos may emerge in the upper branch of the hysteresis under certain conditions. The critical slowing-down and instable characteristics are the intrinsic properties of bistable system, and regarded as the dominant limited factors for increasing switching speed and enhancing system stability. In recent years, many efforts have been made and a variety of schemes have been proposed to solve these issues. However, the related studies are preliminary and need to be inspected deeply. Based on the above considerations, in this paper, the dynamics, stability and application of some typical optical bistable devices have been exploited further. The main work of this dissertation are listed as follows:The bistable characteristics of linearly tapered nonlinear Bragg grating (LT-NLBG) are investigated in detail. The linear stability analysis is implemented to study the influences of system parameters on dynamic stability. The results show that the stable...