le>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">virtual</span></span>  </td>
  </tr>
</table>
</div><div class="memdoc">

<p>Traverse function. </p>
<p>Applies polarization mixing, then chromatic dispersion, then PMD, then loss</p>
<dl class="retval"><dt>Return values</dt><dd>
  <table class="retval">
    <tr><td class="paramname">out</td><td>signal after propagation through channel </td></tr>
    <tr><td class="paramname">results.Jones</td><td>Jones matrix of fiber </td>