title: Local coupling-coefficient characterization in fiber Bragg gratings.
abstract: We propose a new method for characterizing the local parameters of fiber Bragg gratings. This method combines measurement of the complex impulse response by optical low-coherence reflectometry and reconstruction of the complex coupling coefficient by layer peeling. Application of the method to a nonhomogeneous grating shows that the local coupling coefficient can be precisely determined with an axial resolution below 20 microm and a maximum error of less than 5% for amplitude and phase, respectively.
authors.affiliation: Institute of Applied Optics, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland.
authors.forename: Ph
authors.initials: P
authors.lastname: Giaccari
authors.forename: H G
authors.initials: HG
authors.lastname: Limberger
authors.forename: R P
authors.initials: RP
authors.lastname: Salathé