COST 217 intercomparison of measurements on Er-doped fibres

An intercomparison of measurements on three Er-doped fibres has been organised in the working group 3 of the European COST 217 project (optical measurement techniques for advanced optical fibre systems and devices). A set of fibre parameters, including core diameter, refractive index difference, mode field diameter, cut-off, absorption, fluorescence peak wavelength, time constant, doping concentration and gain, have been measured using samples from three fibres made by three participating laboratories. The measurement results and the properties of the three fibres with different core compositions are compared

Interlaboratory evaluation of theoretical modelling techniques for single-mode optical fibres

The results obtained in an interlaboratory evaluation of theoretical modelling methods for single-mode optical fibres, developed in the framework of the COST 217 project, are presented. Values of transmission parameters computed from four different fibre designs are compared with the experimental values obtained in a previous interlaboratory measurement campaign. The consistency of the results obtained with different calculation methods and the accuracy of theoretical predictions are analysed for every one of the usual characterisation parameters of the fibres. The accuracy of the refractive index profile data appears to be the main factor affecting the agreement between theoretically predicted and measured values of the transmission parameters