Spatial Soliton Interactions for Photonic Switching. Part I
COLORADO UNIV AT BOULDER OPTOELECTRONICCOMPUTING SYSTEMS CENTER
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High-bandwidth optical communications will greatly benefit from optical switches since they could eliminate the opticalelectronic conversion. Optical logic gates allowing data regeneration, gain, cascadability, would allow even more complex all-optical routing functions. In this work we report on an in-depth study of an optical logic gates based on spatial and spatio-temporal solitons. Optical solitons that propagate long distances without change, act as the natural carrier of binary data due to their stability to perturbations and intrinsic threshold. The non-diffracting nature of spatial optical solitons lends to their use in a class of angular deflection logic gates in which a weak signal can alter the propagation of a- strong pump in order to change the device state from high to low, thereby implementing a controlled inverter which is cascadable to produce logically-complete, multi-input NOR. Reduced forms of the multi-dimensional, nonlinear spatio-temporal wave equation are solved numerically to study the spatial collision and dragging interactions between orthogonally-polarized spatial solitons and spatio-temporal solitary waves. These three-terminal angular deflection gates, provide complete logic-level restoration, fanout grater than two with large noise margin, and cascadability. In addition, the spatio-temporal logic gates are expected to have pj switching energies using enhanced nonlinear media, and Ps switching times through temporal pipelined operation.
- Electrooptical and Optoelectronic Devices