Design of compact bi-directional triplexer based on silicon nanowire waveguides
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摘要:
A compact bi-directional (BiDi) triplexer using grating-assisted multimode interference (MMI) coupler is proposed based on silicon nanowire waveguides.Because of the high index contrast between silicon and silicon dioxide,the size of the structure is greatly reduced with a footprint of 2.5x911 (μm).Asymmetrical ports are introduced in the MMI structure to satisfy the bandwidth requirements of the industrial standards ITU-T G.983.3-dB bandwidths of 100,22,and 15 nm are obtained for the wavelengths of 1310,1490,and 1550 nm,respectively.The device can be readily fabricated using a commercial CMOS process.