DANSK DS/EN 60793-1-61 PDF

<p class="PARAGRAPH"> <span lang="EN-GB">IEC 60793-1-61: 2017</span><span lang="EN-GB"> establishes uniform requirements for measuring the polarization crosstalk of</span><span lang="EN-GB"> polarization-maintaining (PM) fibres</span><span lang="EN-GB">.</span><span lang="EN-GB"> </span>This document gives two methods for measuring <span lang="EN-GB">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 &quot;averaged&quot; value over a measured waveleng</span><span lang="EN-GB">t</span><span lang="EN-GB">h range. In contrast, the crosstalk value obtained from Method B shows the &quot;worst case&quot; crosstalk value.<o:p></o:p></span> <p class="PARAGRAPH"> <span lang="EN-GB">Keywords: </span><span lang="EN-GB">polarization-maintaining (PM) fibres</span><span lang="EN-GB"><o:p></o:p></span>