Abstract
Through this work, an all-optical 2 × 1 multiplexer (MUX) is realized for optical networking and optical signal processing using two-dimensional photonic crystal waveguides. The structure consists of two T-shaped and one Y-shaped waveguide using square lattice silicon rods with a background of air. The all-optical MUX is designed without using any nonlinear material like Kerr material to overcome the problems of low gain and nonlinear susceptibility. This design works on the principle of beam-interference phenomena. The performance all-optical MUX is simulated with the help of the finite-difference-time-domain method and resultant outputs are verified using the distribution of the optical field at a wavelength of 1.55 μm. The proposed circuit occupies less area 7.8 μm × 9 μm and provides a transmission ratio of more than 92%, a contrast ratio of 29.66 dB in presence of select input and 23.2 dB in absence of select input and it can operate with a bit rate of 1.56 Tbps.
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