Thick film optical waveguides have been integrated with mechanical fiber optics connectors on a single substrate. Micron alignment accuracies are possible by photolitho-graphically fabricating the mechanical fiber guides in the same medium as the optical wave-guides. This allows efficient coupling of light from optical fibers to the thick film light guides. Coupling losses of less than 1 dB have been experimentally verified. Mass producibility, low cost and flexibility of design should make these integrated optics very useful as fiber optics connectors and splitters as well as fiber optics to integrated optics interfaces.
"Thick Film Fiber Optics To Integrated Optics Interface", Proc. SPIE 0176, Guided Wave Optical Systems and Devices II, (26 July 1979); doi: 10.1117/12.957233; https://doi.org/10.1117/12.957233