| 摘要 |
<p>A single mode optical waveguide which is lithographically formed and employs polymeric materials having low propagation loss. The optical waveguide has a substrate (2), a polymeric buffer layer (4) having an index of refraction nb disposed on a surface of the substrate, a patterned, light-transmissive core layer (8) having an index of refraction nc disposed directly on a surface of the cladding layer, and an overcladding layer (10) having an index of refraction no on a top surface of the core, side walls of the core, and exposed portions of the buffer layer, with nb<no<nc and ▵ = nc - no.</p> |
