US Patent 10481334 Fiber to chip optical coupler

An optical connector for optical coupling a plurality of optical fibers to a photonic integrated circuit (PIC) comprises a plurality of fiber trenches; a plurality of tiled flat mirrors; and a plurality of optical focusing elements; wherein each of the plurality of fiber trenches adjoins a corresponding titled flat mirror of the plurality of titled flat mirrors; and wherein each of the plurality of titled flat mirrors is placed in proximity to a corresponding optical focusing element of the plurality of optical focusing elements.