| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical waveguide having an optical path formed with a low refractive index part on the surface, by photosetting very slowly and selectively through light leakage. SOLUTION: In a transparent container 1, there is filled a mixed solution 2 consisting of a first photosetting resin with a low refractive index and a second photosetting resin with a high refractive index which are each different in the hardening mechanism. Into this mixed solution 2, using an optical fiber 3, a light beam having a wavelengthλ<SB>1</SB>is supplied that hardens the first photosetting resin but not the second. As a result, it is possible to harden the first photosetting resin in a fashion taking in the second photosetting resin. This is because hardening raises a refractive index, causing a self-condensing phenomenon to form an optical path part 4. The optical path part 4 generates light leakage around, thereby forming an outer peripheral part 5. Subsequently, the entire unhardened resin is hardened. The outer peripheral part 5 having a high ratio of the first photosetting resin hardenable becomes smaller in the refractive index than the optical path part 4, thereby serving as a clad. COPYRIGHT: (C)2004,JPO |
