Mode Field Diameter (MFD) Reference Fibre
The artefact consists of the cleaved end of an approximate 12 m length of matched clad or dispersion shifted single-mode optical fibre. The fibre can be supplied bare or mounted in a retractable holder. When mounted in the holder, the cleaved end is held in a zirconia ferrule that is itself fitted into a brass barrel. The brass barrel is fitted inside an aluminium holder such that the cleaved end can be retracted inside the housing or exposed through a small hole for measurement.
The certified MFD corresponds to the MFD of the cleaved fibre end. The fibre is used for calibrating instruments that measure the mode field diameter (MFD) of optical fibres.
A copy of a typical Calibration Certificate for a fibre mounted in a holder is available to download.
Specification
| Mode field diameter | MFD Value in the range (µm) | Typical Uncertainty (µm) | Aeff Value in the range (µm2) | Typical Uncertainty (µm2) |
| G.652 fibre @ 1310 nm | 8.8 - 9.6 | ± 0.07 | 60 – 70 | ± 1.4 |
| G.652 fibre @ 1550 nm | 9.9 – 10.9 | ± 0.07 | 75 – 85 | ± 1.7 |
| G.653 fibre @ 1310 nm | 6.6 - 6.9 | ± 0.05 | 30 – 40 | ± 0.8 |
| G.653 fibre @ 1550 nm | 8.5 - 8.8 | ± 0.06 | 50 – 60 | ± 1.2 |
Calibration at other wavelengths is available on request.
Contact
Customer Service tel: +44 20 8943 8637
E-mail: fibreoptics_enquiries@npl.co.uk