Figure 1: Phase-matching condition for 250-nm-tall silicon waveguides. | Nature Communications

Figure 1: Phase-matching condition for 250-nm-tall silicon waveguides.

From: WDM-compatible mode-division multiplexing on a silicon chip

Figure 1

(a) Simulated effective index of the optical modes in waveguide of different widths at λ=1,550 nm. (b) Selective coupling of the single-mode microrings to a specific spatial mode in the multimode waveguide, with each section of the multimode waveguide linked by adiabatic tapered waveguides. The insets show the selective coupling of each multiplexer (TE0, TE1 and TE2).

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