Historical
IEC 60793-1-20 Ed. 1.0 b:2001
Optical fibres - Part 1-20: Measurement methods and test procedures - Fibre geometry
Gives four methods for measuring the geometry of uncoated optical fibres. Parameters include: cladding diameter, cladding non-circularity, core diameter, core non-circularity, core-cladding concentricity error, and theoretical numerical numerical aperture.
International Electrotechnical Commission [iec]
