IEC 61744:2023提供了光纤色散(CD)测试集校准的标准程序。本文件适用于所有类型的CD测试集，但不包括对多模光纤的测量。本文件的目的是定义校准光纤色散（CD）测试集的标准程序。使用的详细校准步骤根据CD测试集中使用的测量技术而有所不同。虽然认识到色散也发生在多模光纤中，并且这种光纤可以在许多CD测试组上测量，但是本文档将仅限于单模光纤测量应用的讨论。本文件中概述的程序的目的是使CD测试装置的制造商和用户关注在所有适用条件下降低光纤色散测定的测量不确定度。这些程序适用于校准实验室和CD测试集的制造商或用户，目的是: a)校准CD测试组，和 b)评估仪器的性能水平。 使用这些程序还可以正确评估CD测试集的不确定度，相对于适当的（例如，国家）标准并可追溯。这第三版取消并取代了2005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)更新术语和定义； b)现在允许使用参考光纤标准进行校准，并且处于与其他校准方法相同的水平； c)附件B分为新的附件B（关于校准不确定度，仍然是规范性的）和新的附件C（关于操作条件下的不确定度，信息性的）；d)删除了关于干涉法的前C.3.4，因为IEC 60793-1-42不再支持该方法； e)删除附录D和文本中其他对校准补偿的引用，以与其他校准文件保持一致； f)删除了附录E和文本中关于使用空气波长的其他参考文献，因为它不用于光纤领域。

IEC 61744:2023 provides standard procedures for the calibration of optical fibre chromatic dispersion (CD) test sets. This document is applicable to all types of CD test sets, with the exception that measurements on multimode optical fibres are excluded. The purpose of this document is to define a standard procedure for calibrating optical fibre chromatic dispersion (CD) test sets. The detailed calibration steps used vary according to the measurement technique used in the CD test set. Whilst it is acknowledged that chromatic dispersion also occurs in multimode fibre and this fibre can be measured on many CD test sets, this document will restrict discussion to single mode fibre measurements applications only. The purpose of the procedures outlined in this document is to focus manufacturers and users of CD test sets toward the reduction of measurement uncertainty in chromatic dispersion determination in optical fibres under all applicable conditions. The procedures apply to calibration laboratories and to the manufacturers or users of CD test sets for the purpose of
a) calibrating CD test sets, and
b) evaluating the level of performance of the instrument.
Use of the procedures also allows correct evaluation of CD test set uncertainty, relative and traceable to appropriate (for example, national) standards. This third edition cancels and replaces the second edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) updated terms and definitions;
b) the use of a reference fibre standard for calibration is now allowed and at the same level as the other calibration method;
c) Annex B was split into a new Annex B (on calibration uncertainty, still normative) and a new Annex C (on uncertainty at operating conditions, informative);
d) removed former C.3.4 on interferometric method since this method is no longer supported in IEC 60793-1-42;
e) removed Annex D and other references in text to calibration compensation to align with other calibration documents;
f) removed Annex E and other references in text to use of air wavelength since it is not used in the fibre domain.