S. MitathaK. DejhanP. P. YupapinN. PornsuwancharoenKing Mongkut's Institute of Technology LadkrabangMahidol UniversityRajamangala University of Technology Isan2018-09-242018-09-242010-02-01Optik. Vol.121, No.3 (2010), 299-301003040262-s2.0-73749087646https://repository.li.mahidol.ac.th/handle/20.500.14594/29111This paper proposes the interesting nonlinear behavior of light known as bifurcation, where the use of such behavior in a micro ring resonator to form the secure digital codes for optical packet switching application is demonstrated. A new concept of the stop-start bits in an optical packet switching protocol is formed by using the bifurcation codes. Bifurcation is introduced when light is input into a nonlinear micro ring device, where the refractive index of an InGaAsP/InP is one of device parameters. The other parameters of the device are coupling coefficient (K) and the ring radius (R), where the ring radii used are ranged from 5 to 10 μm. Simulation results obtained have shown that the packet switching data can be secured by using the generated start-stop bits as the secured codes. © 2008 Elsevier GmbH. All rights reserved.Mahidol UniversityEngineeringMaterials SciencePhysics and AstronomyArticleSCOPUS10.1016/j.ijleo.2008.07.011