IEC 61300的本部分提供了测量偏振消光比（PER）的方法 基于保偏光纤的单模保偏（PM）光学元件。这 该文件还提供了检测PM输入和输出方向的方法 组件的主轴以及估计键控精度的方法，即 主轴和键的机械参考导轨之间的角度偏差 接头（如果有）。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This part of IEC 61300 provides methods for measuring the polarisation extinction ratio (PER) of single-mode, polarisation maintaining (PM) optical components based upon PM fibres. This document also provides methods for detecting the input and output orientation of the PM components' principal axes as well as methods for estimating the keying accuracy, i.e. the angular misalignment between the principal axes and the mechanical reference guide key of the connectors, if these are present.All current amendments available at time of purchase are included with the purchase of this document.