EN 60793-1-61:2017

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Test conditions
5 Reference test method
6 Test methods
7 Results
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

IEC 60793-1-61: 2017 establishes uniform requirements for measuring the polarization crosstalk of polarization-maintaining (PM) fibres. This document gives two methods for measuring the polarization crosstalk of PM fibres. Method A is the power ratio method, which uses the maximum and minimum values of output power at a specified wavelength, and Method B is the in-line method, which uses an analysis of the Poincaré sphere. Details of each method are described in Clause 6. Crosstalk values obtained by Methods A and B are based on different definitions. The crosstalk measured by Method A is defined as an "averaged" value over a measured wavelength range. In contrast, the crosstalk value obtained from Method B shows the "worst case" crosstalk value.

Keywords: polarization-maintaining (PM) fibres