1 Definition of the relevant parameters for
single-mode fibres
1.1 General definitions
1.1.1 refractive index profile
1.1.2 reference Test Method (RTM)
1.1.3 alternative Test Method (ATM)
1.1.4 cladding mode stripper
1.1.5 mode filter
1.2 Mechanical characteristics
1.2.1 primary coating
1.2.2 secondary coating
1.2.3
prooftest level
1.2.4 stress corrosion parameter
1.3 Mode field characteristics
1.3.1 mode field
1.3.2 mode field diameter
1.3.3 mode field centre
1.3.4 mode field concentricity error
1.3.5 mode field non-circularity
1.4 Cladding characteristics
1.4.1 cladding
1.4.2 cladding centre
1.4.3 cladding
diameter
1.4.4 cladding diameter deviation
1.4.5 cladding tolerance field
1.4.6 cladding non-circularity
1.5 Chromatic dispersion definitions
1.5.1
chromatic dispersion
1.5.2 chromatic dispersion coefficient
1.5.3 zero-dispersion slope
1.5.4 zero-dispersion wavelength
1.5.5 source wavelength offset
1.5.6 dispersion offset
1.6 Other characteristics
1.6.1 cut-off wavelength
1.6.2 attenuation
1.6.3 Polarization Mode Dispersion (PMD)
2
Test methods for single-mode fibres
2.1 Test methods for the mode field diameter
2.1.1 Reference test method: The far-field scan
2.1.2 First alternative test method: The
variable aperture technique
2.1.3 Second
alternative test method: The near-field scan
2.2 Test methods for the cladding diameter, mode field
concentricity error and cladding non‑circularity
2.2.1 Reference test method: The transmitted
near-field technique
2.2.2 First alternative test method: The
refracted near-field technique
2.2.3 Second alternative test method: The
side-view technique
2.2.4 Third alternative test method: The transmitted
near field image technique
2.3 Test methods for the cut-off wavelength
2.3.1 Reference test method for the cut-off
wavelength (λc) of the primary coated fibre and
reference test method for the cut-off wavelength (lcj) of jumper cables: The transmitted
power technique
2.3.2 Alternative test method for λc: The split-mandrel technique
2.3.3 Reference test method for the cut-off
wavelength (λcc) of the cabled fibre: The transmitted
power technique
2.3.4 Alternative test method for the cut-off
wavelength (λcc) of the cabled fibre
2.4 Test methods for the attenuation
2.4.1 Reference test method: The cut-back
technique
2.4.2
First alternative test method: The backscattering technique
2.4.3 Second alternative test method: The
insertion loss technique
2.5 Test methods for the chromatic dispersion
2.5.1 Reference test method: The phase-shift
technique
2.5.2 First alternative test method: The
interferometric technique
2.5.3 Second alternative test method: The pulse
delay technique
2.6 Test methods for prooftesting
2.6.1 Reference test method: Longitudinal
tension
2.7 Test methods for polarization mode dispersion
2.7.1 The Jones matrix eigenanalysis technique
2.7.2 The fixed analyser technique
2.7.3 Test method: Interferometric technique
2.7.4 Principal state of polarization (PSP)
methods
Appendix I – Methods of cut-off wavelength interpolation
I.1 Limited negative error method
I.2 Least squares method
Appendix II – Determination of PMD delay from an interferogram
Appendix III – Non-linear attributes
III.1 Background
III.2 Effective area (Aeff)
III.3 Correction factor k
III.4 Non-linear coefficient (n2/Aeff)
III.5 Stimulated Brillouin scattering
III.5.1 Description of the effect
III.5.2 SBS threshold estimation for single-mode
fibres
III.6 Other effects