Cladding Mean Diameter Reference Fibre
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Reference standards for the optical fibre outer ‘cladding’ diameter and non-circularity can ensure quality control for fibre manufacturers as well as inform connector, fibre splice and fibre pigtail design and manufacture. NPL can supply reference fibres that are mounted in retractable holders to protect the cleaved end face.
The artefact consists of the cleaved end of an approximate 2 m length of matched clad single-mode optical fibre mounted in a retractable 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 holder is almost identical to the NIST SRM-style holder design and is compatible with some PK/NetTest measurement instruments. The fibre is used for calibrating instruments that measure the geometry of optical fibres.
The certified mean diameter corresponds to the cleaved fibre end.
A copy of a typical Calibration Certificate is available to download.
Specification
| Typical Value | Typical Uncertainty | |
| Mean Diameter | 125.00 +/- 0.05 µm | ± 0.05 µm |
| Non-circularity | 0.10 % | ± 0.05 % |