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A new guided-wave multi/demultiplexer with high stopband rejection is realised using high-silica embedded channel waveguides. This consists of three directional couplers of the same structure. That is, the second and third directional couplers are connected with two output waveguides of the first directional coupler. This multi/demultiplexer is fabricated using chemical vapour deposition, lithography...
A new multi/demultiplexer is proposed together with its fabrication method, which can compensate for the centre wavelength shift ??0 caused by fabrication process fluctuations. This device consists of a directional coupler with three different-refractive-index (nb, nw and nc) layers; i.e. an underlayer with index nb, a middle core waveguide layer with index nw and an upper layer with index nc (nw...
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