Optical-phased array beam-steering using multi-input slab coupler in silicon nitride waveguides

A 2D beam-steering optical phased array is demonstrated in SiN. The multiple-input slab-coupler reduces OPA footprint 8x versus previous single-input designs. Measured field of view is 15° x 2.8°. Gaussian beam full-width is 0.36° x 0.175°.