National Physical Laboratory

Fibre Coating Diameter

Optical Fibre

Calibration of the outer coating diameter of optical fibres. Fibres with diameters in the range 230 µm to 260 µm can be calibrated with a best measurement capability of ± 0.15 µm.

NPL uses a non-contact measurement method and can measure customer supplied fibres or can supply a calibrated reference fibre which is usually about 150 mm long. Measurements are typically made 15 mm from one end of the fibre.

An example Calibration Certificate is available.

Typical Measurement Uncertainties

  • Outer coating mean diameter: ± 0.15 µm


Customer Service tel: +44 20 8943 8637

Last Updated: 25 Mar 2010
Created: 4 Aug 2009


Please note that the information will not be divulged to third parties, or used without your permission