Fabrication of Special Waveguide Shapes and Mechanical Properties of Glass Fiber Waveguides.

摘要

Special optical fibers with exposed waveguides have been constructed for coupling between fibers and (integrated optics) films. They are typically 1 x 35 micrometers rectangular on a low index supporting structure which has a 200 x 1200 micrometer cross section. These externally mounted fibers were produced by pulling microscope slides of various material in a two step process. Measured coupling efficiencies between spuddered waveguides and externally mounted fibers are 70%. Transition fibers whose core cross section tapers from a rectangular (1 x 20 micrometers) to circular (3 micrometers) in a millimeter or two length have been produced for butt joining semiconductor lasers to round waveguides. They have measured transition losses of less than 1 dB and negligible absorption/scattering loss.