Grating Coupler FDTD Simulation

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Presentation transcript:

Grating Coupler FDTD Simulation

Grating Coupler - Used for coupling light into waveguide or reverse - Grating coupler design: period, etch depth, taper shape - Output angle is decided by effective index, period, input wavelength  Can be confirmed by FDTD Solver

Grating Coupler for 2-D,3-D FDTD 2D-Grating coupler 3D-Grating coupler

Exercise Find the Output angle that maximize optical power for given grating coupler structure and compare with the given equation Input wavelength: 1550nm Pitch(period): 0.68μm, duty cycle: 0.54 Ncladding: 1.45, Neff ~ (2.85+2.34)/2 =2.6 Etch depth: 100nm