Abstract
The waveguide was fabricated by dispersal of a compound with a higher refractive index into poly(methyl methacrylate). Preparation of the waveguide was performed by the vacuum process. The doped region showing the higher refractive index acted as a core, and non-doped matrix PMMA surrounding the core acted as a cladding layer. The refractive index of core was controlled by the treatment temperature. As the waveguide prepared in the present study possessed a large core size, it was favorable for the short-range optical network.
