Integrated optical beamformers

This paper gives an overview of three different types of integrated optical beamfoming networks (OBFNs) that have been designed and/or fabricated over the past few years. The first is a binary tree true time delay based OBFN, the second a novel hardware compressed OBFN exploiting multi-wavelength, and finally an optical beamformer capable of multibeaming based on the Nolen matrix.