DIN EN IEC 63267-2-2:2025-07

This part of IEC 63267 defines the dimensional limits of an optical interface for reference connections necessary to meet specific requirements for fibre-to-fibre interconnection of non-angled and angled polished multimode reference connectors intended to be used for attenuation measurements in the field or factory. Several grades of reference connections are defined in this document. The multimode reference connections are terminated to restricted IEC 60793-2-10 A1-OM2b to A1-OM5b fibre at the 850 nm band only. The geometrical dimensions and tolerances of the specified reference connections have been developed primarily to limit the variation in measured attenuation between multiple sets of two reference connectors, and therefore to limit the variation in measured attenuation between randomly chosen reference connectors when mated with connectors in the field or factory. There are no restrictions on the scope of application of this document. Application of this document enhances investment security for manufacturers and users and provides testing laboratories and manufacturers with defined specifications for testing. The accuracy of measurements of fibre optic connectors or passive optical components is improved by applying the content of this standard - the document is intended for manufacturers of these components and assemblers of fibre optic connectors.