Long Working Distance Apodized Grating Coupler

Understand

We design a focusing grating coupler by a simultaneous apodization of the filling factor and the period.

• In addition to in plane focusing to the input waveguide providing a total length of less than 70{\mu}m, a further apodization of the curvature allows out of plane focusing into a fiber set 150{\mu}m away from the grating surface.
• The design is proposed for novel semiconductor on insulator waveguides such as GaInP.
• The coupling efficiency is calculated from two dimensional simulation which is about 45%.