Abstract

A new-channel-waveguide-fabrication process for use with polyimide is described. The new technique uses an electron-beam-induced effect to alter the refractive index of the polyimides directly. Channel waveguides with an 8-μm-wide, 8-μm-deep core have been fabricated on a polyimide film by the use of electron-beam irradiation. Only one kind of polyimide (6FDA/TFDB) was used in this waveguide. The difference in refractive index between the core and the cladding was approximately 0.30% for both TE-and TM-polarized incident light when the dose was 1500 μC/cm2, which was sufficient to produce waveguides. The optical properties of the waveguide are also demonstrated.

© 1995 Optical Society of America

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