Multi-Wavelength Filtering Wideband by Cascade Bragg Reflectors in Optical Waveguides
Keywords:
Optical communications, optical device for signal processing, bragg filter, wavelength filtering devicesAbstract
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.
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