Research Article
The Critical Adiabatic Linear Tapered Waveguide Combined with a Multimode Waveguide Coupler on an SOI Chip
Figure 7
A 1 × 1 MMI in width of 12 μm and in length of 257.2 μm is combined with the linear tapered waveguide in width Wt of 4.2 μm and in length Lt of 217.7 μm. When the location of input/output linear tapered waveguide is z/Lt of 0/0.25/0.5/0.75/1, the fundamental mode TE0 shape of input/output port is simulated to change the mode shape size from small to larger mode shape under TE0 adiabatic mode conversion.