title: Mask-free hybrid long-period fiber grating fabrication by self-assembled periodic polymerization in silica hollow optical fiber.
abstract: We report a type of hybrid optical fiber created by filling the central hole of a silica hollow optical fiber (HOF) with an organic polymer to serve as the core. After suitable curing of the polymer filling of the HOF, a self-assembled one-dimensional polymer-air periodic structure was created without the need for an amplitude mask. This acts as a long-period fiber grating device with an axial refractive index modulation. Details of the fabrication method for the hybrid fiber grating and its transmission spectra analysis are reported.
authors.affiliation: Institute of Physics and Applied Physics, Yonsei University, Seoul, 120-749, South Korea.
authors.forename: Hojoong
authors.initials: H
authors.lastname: Jung
authors.forename: Yong Gon
authors.initials: YG
authors.lastname: Seo
authors.forename: Woosung
authors.initials: W
authors.lastname: Ha
authors.forename: Dae-Kyu
authors.initials: DK
authors.lastname: Kim
authors.forename: Seung Han
authors.initials: SH
authors.lastname: Park
authors.forename: Kyunghwan
authors.initials: K
authors.lastname: Oh