Abstract
We propose the design of a Magic-T based on a 2×2 Multimode Interference (MMI) coupler with tapered inputs and output waveguides that achieve phase shifts of -π/2 relative to the other port. This device is suitable for organic-inorganic hybrid material implementation. The Magic-T is an important component for application in all-optical signal processing since it can achieve sums and subtractions at its output ports. By using organic- inorganic hybrid materials and specifically di-ureasils, we achieve a cost-effective solution, as the materials benefit from the simplicity of Sol-Gel process and waveguides can be manufactured by single exposure UV photolithography. The simulation results obtained by Beam Propagation Method (BPM) demonstrated good tolerances regarding both propagation wavelength and Magic-T dimensions. For a Magic-T designed for 1555 nm, the maximum power variations observed over the C+L bands are 2.85% and 0.0759% in sum and subtraction ports respectively. The simulated dimension fabrication tolerance indicate power variations below 0.1% for both sum and subtraction ports using typical commercial Chrome amplitude masks.
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