title: Transfer-matrix method based on a discrete coupling model for analyzing uniform and nonuniform codirectional fiber grating couplers.
abstract: A simple and efficient transfer-matrix method based on a discrete coupling model is presented to analyze uniform and nonuniform fiber grating couplers between copropagating core and cladding modes. Uniform and piecewise-uniform long-period gratings were fabricated by a point-by-point arc discharge technique. Their measured transmission spectra were compared with the transmission spectra calculated by the presented method.
authors.affiliation: Department of Electro-Mechanical Engineering, Osaka Electro-Communication University, Neyagawa, Osaka, Japan.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Abrishamian
authors.forename: Katsumi
authors.initials: K
authors.lastname: Morishita