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Grating coupler based on 220 nm Si-on-insulator (SOI) substrate was designed and optimized for operation at 2 μm wavelength targeting telecommunication application. Decent coupling efficiency of around 18% is achieved, which is consistent with the simulation results and can be employed in 2 μτη-based photonic integrated circuit.
We design an ultra-compact silicon-on-insulator (SOI) add-drop microring filter with a 0.8-µm radius for WDW signal processing in a chip. The add-drop filter with a very large free spectra range of 136 nm, a deep through-port and drop-port extinction ratio of nearly 25dB and the insertion loss of less than 0.1 dB is achieved.
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