title: Simple process for fabricating a monolithic polymer optical waveguide.
abstract: A simple and economical fabrication process for a monolithic polymer optical waveguide in which different materials are serially grafted is proposed and demonstrated. A cladding layer with a waveguide core groove is fabricated by microtransfer molding. An epoxy resin solution is spin coated onto the cladding before selective photoexposure to form a transparent waveguide core. An optical functional polymer solution is then spin coated to form a serially grafted waveguide structure. Thus two types of polymer fill the groove to realize a monolithically integrated waveguide. Controlling the groove shape results in a flat surface. A low connection loss between the two polymers, less than 0.01 dB/point, is obtained.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan. takayuki@mail.tagen.tohoku.ac.jp
authors.forename: Takayuki
authors.initials: T
authors.lastname: Matsui
authors.forename: Kyoji
authors.initials: K
authors.lastname: Komatsu
authors.forename: Okihiro
authors.initials: O
authors.lastname: Sugihara
authors.forename: Toshikuni
authors.initials: T
authors.lastname: Kaino