Blonder, Greg2019-07-092019-07-091990-10-301989-08-23Greg Blonder. "Device including a component in alignment with a substrate-supported waveguide." U.S. Patent 4,966,433-A.4,966,433https://hdl.handle.net/2144/36318In an optical device such as, e.g., an optical communications coupler or an optical gyroscope, a substrate-supported waveguide is aligned with a device component such as, e.g., an optical fiber or a photodetector. Optical alignment of such component relative to the waveguide is facilitated as the component is located in a preferentially etched groove in the substrate supporting the waveguide. In the case of an optical fiber connection, optical coupling is facilitated by a ledge structure overhanging a sloping etched wall of a groove holding the fiber. In the case of a photodetector, an etched groove may be essentially perpendicular to the direction of light propagation.Patent423766