2650 Preform Analyzer

The vertical design of the 2650 Preform Analyzer gives fiber manufacturers the ability to fully automate preform positioning, facilitating rapid and comprehensive characterization of preform structure. From the acquired index profile data, the 2650 calculates preform geometry metrics such as core diameter, preform outside diameter, and concentricity. For single-mode fiber preforms, the profile data also yields equivalent step-index (ESI) profile parameters which enables prediction of the mode field diameter, cut-off wavelength and chromatic dispersion of the fiber that will be drawn from the preform. The alpha coefficient of multimode fiber preform profiles can be also be calculated. All calculations provide essential feedback for preform process control. The 2650 is particularly well-suited for characterizing large diameter preforms.