What is BS EN IEC 62614‑1 about?
BS EN IEC 62614 is a series on fibre optics. BS EN IEC 62614‑1 describes the launch condition requirements used for measuring multimode attenuation in passive components and in installed cable plants.
In BS EN IEC 62614‑1, the fibre types that are addressed include category A1-OMx, where x = 2, 3, 4 and 5 (50 μm/125 μm), and A1-OM1 (62,5 μm/125 μm) multimode fibres. BS EN IEC 62614‑1 can be suitable for multimode attenuation measurements for other multimode categories and/or other wavelengths. BS EN IEC 62614‑1 describes launch condition requirements for optical attenuation using sources with a controlled encircled flux (EF).
Note 1: The source condition for other categories and wavelengths are not defined here.
Who is BS EN IEC 62614‑1 for?
BS EN IEC 62614‑1 on fibre optics is useful for:
- Fibre optic equipment and component manufacturers
- Design engineers
- Telecommunication sectors
Why should you use BS EN IEC 62614‑1?
BS EN IEC 62614‑1 helps you to measure multimode attenuation which can be defined as the attenuation pertaining to multimode fibres and/or multimode fibre components, systems and subsystems.
The condition used for measuring multimode attenuation is the light source. Light sources, typically used in measuring attenuation, can produce varying modal distributions when launched into multimode fibre. These differing modal distributions, combined with the differential mode attenuation (DMA) inherent in most multimode components, commonly cause measurement variations when measuring the attenuation of multimode components.
BS EN IEC 62614‑1 explains that experts have concluded that the launch condition should be expressed at the interface between the test instrument launch cord and the terminated fibre to be tested. That is, the launch condition should be based in part on the measured near field at the output of the launch cord. The key to making reproducible attenuation measurements across various sources is to narrowly constrain the range of power distribution at large radii so that all compliant sources produce closely agreeing on attenuation measurement results.
BS EN IEC 62614‑1 helps you to ensure the consistency of field measurements when different types of test equipment are used. BS EN IEC 62614‑1 also helps to ensure consistency of factory measurements when different types of test equipment are used. In addition, BS EN IEC 62614‑1 helps you to ensure the consistency of field measurements when compared with factory measurements.
What’s changed since the last update?
BS EN IEC 62614‑1:2020 supersedes BS EN 62614:2010. BS EN IEC 62614‑1:2020 includes some technical changes with respect to BS EN 62614:2010. These include:
- Increase of the value of the uncertainty attenuation variation coefficient Y for 50 μm core fibre at 1 300 nm, due to launch conditions, to twice the previous value
- Changes to 3.4, 5.6, including Table 5, and some references to remain consistent with IEC 61280-4-1:2019
- Changes to multimode fibre references to be consistent with IEC 60793-2-10:2019