Simultaneous Optical Half-Adder and Half-Subtracter Using a Single-Slot Waveguide

Simultaneous Optical Half-Adder and Half-Subtracter Using a Single-Slot Waveguide

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We propose a simple approach for simultaneous optical half-adder and half-subtracter using a single-slot waveguide that offers tight light confinement and enhanced nonlinearity.By exploiting the parametric depletion effect of twin degenerate four-wave mixing processes in the slot waveguide, we simulate 160-Gbit/s half-adder (A + B) and half-subtracter (A - B, B - A) and characterize the operation performance in terms of quality Q factor, extinction ratio ER, and eye opening EO.Two different nonlinear materials are natio celebrate eyeshadow palette considered as the slot region for comparison.One is silicon-nanocrystal (Si-nc) with Kerr nonlinear index of refraction (n2) of 4.8 ×10-17 m2/W and two-photon absorption (TPA) coefficient (βTPA) of 7 ×10-11 m/W at 1550 nm, and the other is a specific polydiacetylene, poly-[2,4 hexadiyne -1,6 diol-bis-( p -toluene sulfonate)] (PTS) with n2 = 6.

25 ×10-17 m2/W and Latest Product Releases & Innovations – Stay Updated! βTPA ≈ 0 at 1550 nm.PTS slot waveguide features superior performance of half-adder and half-subtracter compared with Si-nc slot waveguide under the same waveguide length and input signal power.Moreover, we study the performance dependence on the waveguide length and input power, providing an easy-to-follow theoretical basis for achieving the desired performance of half-adder and half-subtracter.