ITU-T Rec. G.652 (1988) – Characteristics of a single-mode optical fibre cable
1 Fibre characteristics
    1.1 Mode field diameter
    1.2 Cladding diameter
    1.3 Mode field concentricity error
    1.4 Non-circularity
    1.5 Cut-off wavelength
    1.6 1550 nm loss performance
    1.7 Material properties of the fibre
    1.8 Refractive index profile
    1.9 Examples of fibre design guidelines
2 Factory length specifications
    2.1 Attenuation coefficient
    2.2 Chromatic dispersion coefficient
3 Elementary cable sections
    3.1 Attenuation
    3.2 Chromatic dispersion
ANNEX A – Meaning of the terms used in the Recommendation
A.1 mode field diameter
A.2 cladding surface
A.3 cladding surface centre
A.4 cladding surface diameter
A.5 non-circularity of the cladding surface
A.6 mode field
A.7 mode field centre
A.8 mode field concentricity error
A.9 mode field non-circularity
A.10 cut-off wavelength
A.11 chromatic dispersion
A.12 chromatic dispersion coefficient
A.13 zero-dispersion slope
A.14 zero-dispersion wavelength
ANNEX B – Test methods for single-mode fibres
B.1 – Section I – Test methods for the mode field diameter of single-mode fibres
B.2 – Section II – Test methods for the geometrical characteristics excluding the mode field diameter
B.3 – Section III – Test methods for the cut-off wavelength
B.4 – Section IV – Test methods for attenuation measurements
B.5 – Section V – Test methods for chromatic dispersion coefficient measurement