Accession Number : ADA376576


Title :   Spatial Soliton Interactions for Photonic Switching. Part I


Descriptive Note : Final rept.


Corporate Author : COLORADO UNIV AT BOULDER OPTOELECTRONICCOMPUTING SYSTEMS CENTER


Personal Author(s) : Wagner, Kelvin H ; Blair, Steve


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a376576.pdf


Report Date : 07 Mar 2000


Pagination or Media Count : 176


Abstract : High-bandwidth optical communications will greatly benefit from optical switches since they could eliminate the optical/electronic 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.


Descriptors :   *SPATIAL DISTRIBUTION , *OPTICAL COMMUNICATIONS , *PHOTONICS , GATES(CIRCUITS) , NONLINEAR OPTICS , LOGIC DEVICES , MAXWELLS EQUATIONS , OPTICAL SWITCHING , DIGITAL COMPUTERS , INVERTERS , SOLITONS , REGENERATION(ENGINEERING) , HELMHOLTZ EQUATIONS


Subject Categories : Electrooptical and Optoelectronic Devices
      Telemetry


Distribution Statement : APPROVED FOR PUBLIC RELEASE