EN 60793-1-22:2002

Introduction
1 Scope
2 Normative references
3 Overview of method
  3.1 Method A - Delay measuring
  3.2 Method B - Backscattering
  3.3 Method C - Fibre elongation
  3.4 Method D - Mechanical length
  3.5 Method E - Phase shift
  3.6 Reference test method
4 Apparatus
5 Sampling and specimens
6 Procedure
7 Calculations
8 Results
9 Specification information
Annex A (normative) Requirements specific to method A -
        Delay measuring
Annex B (normative) Requirements specific to method B -
        Backscattering
Annex C (normative) Requirements specific to method C -
        Fibre elongation
Annex D (normative) Requirements specific to method D -
        Mechanical length
Annex E (normative) Requirements specific to method E -
        Phase shift
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Figures

Gives methods for measuring the length and elongation of optical fibres (typically within a cable). Length is fundemental for evaluation of transmission characteristics such as losses and bandwidths. Five methods are described: delay measurement, backscattering, fibre elongation, mechanical length, and phase shift.