SN EN 61300-3-2 : 1999

1 General
      1.1 Scope and object
      1.2 General description
2 Apparatus
3 Procedure
      3.1 Precautions
      3.2 Reference options
      3.3 Method A - All states of polarization
      3.4 Method B - Linear polarization only
5 Details to be specified
Annex A (informative) In-line, all-fibre polarization adjuster
Fiture 1 - Examples of Method A launch apparatus
Figure 2 - Examples of Method B launch apparatus
Figure 3 - Measurement steps for cutback fibre
Figure 4 - Measurement steps for substitute fibre
Figure 5 - Ratio measurement
Figure A.1 - Equivalent scheme of a fibre optic polarization adjuster
             realized by a cascade of three retardation discrete
             elements
Figure A.2 - Example of polarization effect obtained by a fibre
             polarization adjuster

Covers the dependence of attenuation in single-mode fibre optic devices to changes in polarization. Applicable to any single-mode interconnecting device and passive component, including connectors, switches, splicers, isolators, branching devices and attenuators. Used to measure the total range of attenuation, due to changes in polarization of the launch state. Also used to measure the total range of coupling ratio, but cannot be used to measure the polarization dependence of return loss.