Diffraction loss and optical crosstalk in hybrid receiver for free-space optical interconnections

A free space chip-to-chip optical interconnection system using hybrid architecture is presented here. The Gaussian beam propagation model and the ray transform matrices are utilized to design the optical interconnect link. The optical performance of the hybrid optical receiver is computed using a scalar diffraction theory and the results compared with ray transform matrices. Also, the diffraction loss and the optical crosstalk are computed as a function of microlens diameter for various microlens pitch.