DANSK DS/EN 60793-1-60 PDF

<p class="PARAGRAPH"> <span lang="EN-GB">IEC 60793-1-60: 2017 defines test me</span><span lang="EN-GB">t</span><span lang="EN-GB">hods for both the phase beat length, and the group beat length. These two parameters are defined differently, and will give different results depending on the type of </span><span lang="EN-GB">polarization-maintaining (</span><span lang="EN-GB">PM</span><span lang="EN-GB">)</span><span lang="EN-GB"> fibre. The phase beat length is the relevant parameter for the fibres ability to maintain a high extinction ratio. This is de</span><span lang="EN-GB">s</span><span lang="EN-GB">cribed in more details in Annexes A and B.<o:p></o:p></span> <p class="PARAGRAPH"> <span lang="EN-GB">Keywords: phase beat length, high extinction<o:p></o:p></span>