BS 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

Establishes uniform requirements for measuring the length and elongation of optical fibre (typically within cable).

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.