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We derive an analytical relation for the maximum number of output channels for high-performance multimode interference (MMI)-based 1 × N optical beam splitters for a given MMI width. Using eigenvalue-expansion-based simulation results, we validate the analytical relation. Experimental data from MMIs fabricated on silicon nanomembrane also confirm the effectiveness of the design methodology for on-chip optical beam splitter designs.
Selected Topics in Quantum Electronics, IEEE Journal of (Volume:17 , Issue: 3 )
Date of Publication: May-June 2011