IEC 61755-2-2:20 22定义了单模光纤连接的一组规定条件，该条件被维持以满足随机配对的成角度抛光物理接触（APC）光纤对中的衰减和回波损耗（RL）性能的要求。该模型使用光强度在指定模场直径（MFD）上的高斯分布来基于MFD失配以及横向和角度光纤芯偏移的量来确定衰减性能等级。IEC 61755-1中定义了衰减和RL性能等级。这第二版取消并取代了2006年出版的第一版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: -增加规范性参考和视觉要求； -重新考虑文本的整个部分，以避免误用标准。

IEC 61755-2-2:2022 defines a set of prescribed conditions for a single-mode fibre optic connection that is maintained in order to satisfy the requirements of attenuation and return loss (RL) performance in a randomly mated pair of angled polished physically contacting (APC) fibres. The model uses a Gaussian distribution of light intensity over the specified mode field diameter (MFD) for determination of attenuation performance grades, based on MFD mismatch and the amount of lateral and angular fibre core offsets. Attenuation and RL performance grades are defined in IEC 61755-1. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of normative references and visual requirements;
- reconsideration of the whole parts of the text to avoid misuse of the standard.