Cavity solitons in VCSEL: a single pane solution of optical information technology

摘要

Cavity soliton (CS), a unique class of localized pattern inside a wide-area, driven cavity system is investigated from the perspective of mathematical modeling as well as applications in optical information technology. Possibility of generation of CSs is explored in different cavity systems; all having a vertical cavity surface emitting laser as the key component. Parametric space for the stability of the CS and the CS clusters is demarcated. The potential of using such CS as future 'bits' of information is elaborated. Schemes are developed to demonstrate how the cluster formation of CSs can be used to realize all-optical multilevel data encryption system. The role of nonlinear saturable absorber for the generation of CS is highlighted. In certain operating conditions the CSs exhibit spontaneous movement that basically owes to the gradients present in the system. Interaction dynamics of two or more CSs are investigated. Besides the regular ones the CSs show-off few unique dynamics like 'all-optical push broom' and 'all-optical-marching'. The possibility and challenges to utilize the gradient-driven CS dynamics for the realization of 'on-chip' microscope are discussed.