IEC 60793-1-44:2023 CMV包含官方标准及其注释版本。注释版本为您提供了一种快速简单的方法来比较IEC 60793-1-44:2023版3.0和之前的IEC 60793-1-44:2011版2.0之间的所有更改。此外，还提供了IEC SC 86A专家的意见，以解释最相关变更的原因，或澄清内容的任何部分。 IEC 60793-1-44:2023建立了测量单模光纤截止波长的统一要求，从而有助于商业用途光纤和电缆的检查。本文件给出了测量无缆或有缆单模电信光纤截止波长的方法。这些程序适用于所有B类和C类纤维类型。有三种部署方法用于测量切割-关闭波长: -方法A:使用22米长的无缆光纤样品lcc切断电缆； -方法B:使用电缆光纤22m长样品lcc切断电缆； -方法C:使用2 m长的无缆光纤样品进行光纤切断，lc。 所有方法都需要参考测量。有两种参考扫描技术，其中一种或两种都可以用于所有方法: -弯曲参考技术； -使用A1类(OM1-OM5)多模光纤的多模参考技术。 这第三版取消并取代了2011年出版的第二版。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: a)使用纤维环的直径来描述展开； b)增加了与截止曲线伪影相关的附录D； c)重新组织信息并添加更多数字以澄清概念。

IEC 60793-1-44:2023 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60793-1-44:2023 edition 3.0 and the previous IEC 60793-1-44:2011 edition 2.0. Furthermore, comments from IEC SC 86A experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content.

IEC 60793-1-44:2023 establishes uniform requirements for measuring the cut-off wavelength of single-mode optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes. This document gives methods for measuring the cut-off wavelength for uncabled or cabled single mode telecom fibre. These procedures apply to all category B and C fibre types. There are three methods of deployment for measuring the cut-off wavelength:
- method A: cable cut-off using uncabled fibre 22 m long sample, lcc;
- method B: cable cut-off using cabled fibre 22 m long sample, lcc;
- method C: fibre cut-off using uncabled fibre 2 m long sample, lc.
All methods require a reference measurement. There are two reference-scan techniques, either or both of which can be used with all methods:
- bend-reference technique;
- multimode-reference technique using category A1(OM1-OM5) multimode fibre.
This third edition cancels and replaces the second edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) used the diameter of the fibre loops to describe deployment;
b) added Annex D related to cut-off curve artifacts;
c) reorganized information and added more figures to clarify concepts.