title: Far-field power-distribution measurement in axially symmetrical and nonsymmetrical fibers using a variable-width slit.
abstract: A method for the measurement of the far-field power radiation pattern in axially symmetrical and nonsymmetrical single-modeoptical fibers is proposed. The method, based on monitoring of the power passed through a variablewidth slit in the far field, gives the power distribution as an associated Gauss-Laguerre expansion. The experimental setup permits the study of the power distribution and mode-field diameter dependence on the wavelength. Results for different types of single-mode optical fiber, including polarization-maintaining types, are presented.
authors.affiliation: Laboratorio de Comunicaciones Opticas, Cables de Comunicaciones S.A., Zaragoza, Spain.
authors.forename: M J
authors.initials: MJ
authors.lastname: Oquiñena
authors.forename: F
authors.initials: F
authors.lastname: Villuendas
authors.forename: J B
authors.initials: JB
authors.lastname: Marqués
authors.forename: J
authors.initials: J
authors.lastname: Pelayo