Abstract— A double filtering function has been obtained by realization of a double Bragg gratings (BGs) structure based on titanium-diffused optical waveguides in lithium niobate Ti:LiNbO3 has been reported. Focused Ion Beam (FIB) technique is being used in order to obtain homogeneous periodic microstructures. This double structure (D.S.) is characterized by wavelengths reflected around the bands 1203nm and 1527nm with a coefficient of about 96% and Full widths at half maximums are in the vicinity of 50 and 56nm. Experimental results agree well with the results of the simulations. As a perspective, an improvement in the bandwidth of this structure is considered so that it can find its application in coding/decoding optical CDMA is discussed.
Index Terms— Optical communications, optical device for signal processing, bragg filter, wavelength filtering devices.
K. Ghoumid is with the Ecole Nationale des Sciences Appliquées d’Oujda, ENSAO, B.P 669, 60000 Oujda - Maroc, and also with Institut Femto-ST Département LOPMD, UMR CNRS 6174, Université de Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France (e-mail: kghoumid@ensa.univ-oujda.ac.ma).
I. Elhechmi and T. Gharbi are with the Nanomedicine Lab, Imagery and Therapeutics EA 4662, Université de Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France (e-mail: imen.el hechmi@univ-fcomte.fr ; tijani.gharbi@univ-fcomte.fr).
S. Mekaoui is with the L.C.P.T.S. Télécommunications, Faculté d’Electronique et d’Informatique, USTHB, Alger 16111, Algeria (e-mail: smekaoui@usthb.dz).
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Cite: Kamal Ghoumid, Imen Elhechmi, Slimane Mekaoui, and Tijani Gharbi, " Multi-Wavelength Filtering Wideband by Cascade Bragg Reflectors in Optical Waveguides," International Journal of Information and Electronics Engineering vol. 3, no. 5, pp. 506-509, 2013.
