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An optical code generating device for security access system application is presented. The code generating device constructed using asymmetric hollow optical waveguide coupler design provides a unique series of output light intensities which are successively used as an optical code. The design of the waveguide is made using two major components which are asymmetric Y-junction splitter and a linear taper. Waveguiding is done using a hollow waveguide structure. Construction of higher level 1×N hollow waveguide coupler is done utilizing a basic 1×2 asymmetric waveguide coupler design together with a cascaded design scheme. Non-sequential ray tracing of the asymmetric hollow optical waveguide couplers is performed to predict the optical transmission properties of the waveguide. A representation of the code combination that can be generated from the device is obtained using combinatory number theory.
An optical code generating device for security access system application is presented. The code generating device constructed using asymmetric hollow optical waveguide coupler design a unique series of output light intensities which are successively used as an optical code. The design of the waveguide is made using Two major components which are asymmetric Y-junction splitter and a linear taper. Construction of higher level 1 × N hollow waveguide coupler is done utilizing substantially 1 × 2 asymmetric waveguide coupler design together with a cascaded Design scheme. Non-sequential ray tracing of the asymmetric hollow optical waveguide couplers is performed to predict the optical transmission properties of the waveguide. A representation of the code combination that can be generated from the device is obtained using combinatory number theory.