IEC 61300-3-2:2009规定了测量方法，以确定单模光纤设备中损耗对偏振变化的依赖性。该程序侧重于使用固定波长源进行测量；因此，本程序适用于单个波长的特性可以代表更宽波段特性的设备。此类装置的典型示例为单模互连装置和无源元件，包括连接器、拼接、分支装置、衰减器、隔离器和开关。观察到的传输损耗的最大变化称为偏振相关损耗（PDL）。本标准适用于宽带设备，不适用于滤波器和多路复用器等窄带设备。读者可参考IEC 61300-3-29进行此类测量。 第三版取消并取代1999年出版的第二版。这是一项技术性修订。与上一版相比，本版的主要变化是:本版既包括上一版的所有状态法，也包括IEC 61300-3-12中的穆勒矩阵法。 关键词:确定单模光纤器件损耗对偏振变化依赖性的测量方法

IEC 61300-3-2:2009 specifies measurement methods to determine the dependence of loss in a single-mode fibre optic device to changes in polarization. This procedure focuses on measurements with a fixed wavelength source; therefore, this procedure is applicable to devices whose properties at a single wavelength can represent those over the broader wavelength band. Typical examples of such devices are single-mode interconnecting devices and passive components, including connectors, splices, branching devices, attenuators, isolators, and switches. The maximum observed variation in transmission loss is referred to as polarization-dependent-loss (PDL). This standard applies to broadband devices and not to narrow-band devices like filters and multiplexers. The reader is referred to IEC 61300-3-29 for such measurements. This third edition cancels and replaces the second edition published in 1999. It constitutes a technical revision. The main changes with respect to the previous edition are: this edition includes both the all-states method of the previous edition as well as the Mueller matrix method from IEC 61300-3-12. Keywords: measurement methods to determine the dependence of loss in a single-mode fibre optic device to changes in polarization