Device including a component in alignment with a substrate-supported waveguide
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Citation (published version)Greg Blonder. "Device including a component in alignment with a substrate-supported waveguide." Patent EP-0331332-A2.
In 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 (61) relative to the waveguide (64) is facilitated as the component is located in a preferentially etched groove (31) in the substrate supporting the waveguide (11). In the case of an optical fiber connection, optical coupling is facilitated by a ledge structure (41) overhanging a sloping etched wall of a groove holding the fiber (14). In the case of a photodetector, an etched groove may be essentially perpendicular to the direction of light propagation.