| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical waveguide which reduces the loss ratio of light propagated and excels in heat resistance. SOLUTION: This optical waveguide has a clad which has a refractive index lower than a core and is provided so as to cover the core, and the core is composed of a polycarbodiimide represented by formula (1) (wherein R is a diisocyanate residue; R<SP>1</SP>is a monoisocyanate residue; and (n) is an integer of 1-100). COPYRIGHT: (C)2005,JPO&NCIPI |
