| 摘要 |
PURPOSE:To reduce the transmission loss without spoiling flexibility by forming high polymer resin outside a waveguide formed of a thin film and a metallic layer thinly as a waveguide wall on the dielectric thin film. CONSTITUTION:At least one thin metallic film 12 is provided outside at least one dielectric thin film which has small absorptivity in the oscillation wavelength range of laser light in use and the high polymer resin layer 12 which is thick enough to maintain the mechanical strength of the waveguide is formed outside it. Thus, the high polymer resin coating is provided, so even if the waveguide is bent repeatedly or to small curvature, the high polymer resin is rich in flexibility, so its adaptive force to such bending is high and even the hollow optical waveguide formed of an optically thin film is usable while bent to a small radius of curvature. The transmission loss which causes a problem at the time of using the high polymer resin outside is reduced by providing the thin metallic film 12. |
