Integrated optical phased array

The present disclosure relates to an integrated optical phased array (OPA) with a large field of view (FOV), possibly up to 180 degrees FOV. One embodiment regards a chip integrated optical phased array, comprising: a phase shifter array having N input light channels and configured for tuning the phase of the N input light channels; a beam splitter configured for splitting light from a light source into the N input channels of the phase shifter array; a waveguide array configured for squeezing the phase tuned N light channels to a narrow pitch output end such that the light form N channels interfere to form a plane wave at the output end; and a plane emitting surface configured for transforming the plane wave to light emittance out of the chip with a predefined field of view (FOV). Another embodiment regards an OPA with an on-chip beam expander for small beam divergence with a relatively low number of channels.