What is BS EN 61755-2-4- Connector optical interfaces about?
BS EN 61755-2-4 is a safety standard on the connection parameters of non-dispersion shifted single mode physically contacting fibres.
BS EN 61755-2-4 defines a set of prescribed conditions that should be maintained to satisfy the requirements of non-angled polished reference connections. The prescribed conditions include dimensional limits and optical fibre requirements of the optical interface to meet specific requirements for reference connection (plugs and adaptors) used for attenuation measurements.
Two different grades for reference connections are defined in BS EN 61755-2-4. The use of each of these grades depends on the application and on the targeted attenuation measurement uncertainty. The model uses a Gaussian distribution of light intensity over the specified restricted mode field diameter (MFD) range. BS EN 61755-2-4 is intended to be used for shipping and acceptance inspections.
Note: The use of the reference connector plug would not be recommended where classification of fibre is difficult, for example, construction and maintenance of cable plant.
Who is BS EN 61755-2-4- Connector optical interfaces for?
BS EN 61755-2-4 on the connection parameters of non-dispersion shifted single mode physically contacting fibres is relevant to:
- Manufacturers of fibre optic interconnecting devices and passive components
- Manufacturers of connector optical interfaces
- Manufacturers of optical fibre
- Fibre optic technicians
- Fibre optic workers
- Testing authorities
Why should you use BS EN 61755-2-4- Connector optical interfaces?
Optical reference connector plugs are connector plugs manufactured with restricted tolerances for dimensions relevant to lateral and angular offset. These connector plugs are used for attenuation measurement purposes and is considered as part of the measurement set-up since they strongly contribute to its measurement uncertainty.
BS EN 61755-2-4 assists with the connection parameters of non-dispersion shifted single mode physically contacting fibres. The main parameters influencing the performance of the reference connector plugs are fibre core location, fibre core axis angle and mode field diameter variability. BS EN 61755-2-4 represents the fibre alignment tolerances for two different grades. The principal performance of a reference connector plug is given in BS EN 61755-2-4 for its contribution to measurement uncertainty (estimated based on the reproducibility of an attenuation measurement of the same device performed using multiple different reference connector plugs of the same grade) which is determined by the accuracy with which the core of the optical fibre is aligned to the optical datum target and determines the random attenuation performance of a reference connector population.
Overall, BS EN 61755-2-4 is useful as it provides the design curves which represent maximum allowable combinations of a given specific fibre core location and an associated fibre core axis angle to not exceed the specified attenuation of any single considered connection.
