What is PD IEC TR 62284- Single-mode optical fibres about?
PD IEC TR 62284 is an international standard that discusses the measurements of single-mode optical fibres.
PD IEC TR 62284 applies to single-mode optical fibres. It covers the methods for measuring the effective area (Aeff) of these fibres.
PD IEC TR 62284 defines three methods of measuring Aeff. and gives information common to all the methods. Information specific to each method is found in the annexes of PD IEC TR 62284. The three methods are as follows:
- Direct far-field (DFF)
- Variable aperture in the far-field (VAMFF)
- Near-field (NF)
The reference method, used to resolve disputes, is the first method, direct far-field.
The direct far-field is the reference method because it is the most direct method and is named as the reference method for mode field diameter in the ITU.
In accordance with PD IEC TR 62284, a mapping function is a formula by which the measured results of one attribute are used to predict the value of another attribute on a given fibre. For a given fibre type and design, the mode field diameter (MFD) (IEC 60793-1-45) is used to predict the effective area with a mapping function. A mapping function is specific to a particular fibre type and design. Mapping functions are generated by doing an experiment in which a sample of fibre is chosen to represent the spectrum of values of MFD and in which the fibres in the samples are measured for both MFD and Aeff.
Who is PD IEC TR 62284- Single-mode optical fibres for?
PD IEC TR 61282-2 on single-mode optical fibres is relevant to:
- Manufacturers of single-mode optical fibres
- Optical fibre technicians and engineers
- Optical fibre installers
- Applications engineers
- Testing authorities
Why should you use PD IEC TR 62284- Single-mode optical fibres?
Effective area is an optical attribute that is specified for single-mode fibres and used in system designs that may be affected by the non-linear refractive index coefficient, n2. Methods A, B, and C have been recognised as providing equivalent results, provided that good engineering is used in the implementation. Single-mode optical fibre is a single glass fibre strand used to transmit a single-mode or ray of light.
PD IEC TR 62284 provides you with proper documentation of the methods for measuring the effective area (Aeff) of these fibres. There is an agreement in both national and international standards bodies concerning the definition used in PD IEC TR 62284.
PD IEC TR 62284 includes schematics for each method. It gives you the information about apparatus, test procedure, and calculation for the direct far-field method, variable aperture far-field method and the near-field method.
PD IEC TR 62284 recommends using an optical lens system or fibre pigtail to excite the test fibre. Usage of a device that extracts cladding modes is suggested.
Overall, PD IEC TR 62284 is useful as it provides guidance on the effective area measurements of single-mode optical fibres which can be beneficial for your business.
