光纤互连器件和无源组件 基本测试和测量程序 第3-14部分：检验和测量 可变光衰减器衰减设置的误差和重复性

[中文适用范围]： IEC 61300-3-14:2025 提供了一种测量可变光衰减器（VOA）衰减值设置误差和重复性的方法。VOA有两种控制技术：手动控制和电动控制。本文件涵盖了这两种VOA控制技术，同时也适用于单模光纤和多模光纤的VOA。对于电动控制的VOA，衰减的滞后特性有时是重要的。滞后特性可根据附录B中所述方法进行测量。本第四版取消并替换了2014年发布的第三版。本版为技术修订版。与前一版相比，本版包括以下重大技术变更：a) 增加IEC 61315《光纤光功率计的校准》作为规范性参考；b) 增加第3章，包含术语、定义和缩略语；c) 增加关于允许用2σ定义重复性的注释；d) 修正图1a）和图1b）中的错误；e) 增加关于多模光源EF发射条件要求的明确说明；f) 将“探测器”改为“功率计”；g) 将第7章和第8章合并为新的第8章，标题为“需指定和报告的细节”；h) 在第7章中增加不确定性考虑；i) 修正公式（B.3）中的错误。 [外文原描述]： IEC 61300-3-14:2025 provides a method to measure the error and repeatability of the attenuation value settings of a variable optical attenuator (VOA). There are two control technologies for VOAs: manually controlled and electrically controlled. This document covers both VOA control technologies and also both single-mode fibres and multimode fibres VOAs. For electrically controlled VOAs, the hysteresis characteristics of attenuation are sometimes important. The hysteresis characteristics can be measured as stated in Annex B. This fourth edition cancels and replaces the third edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) addition of IEC 61315, Calibration of fibre-optic power meters as normative reference; b) addition of Clause 3 containing terms, definitions and abbreviated terms; c) addition of notes for permission of repeatability definition with 2σ; d) correction of error in Figure 1 a) and Figure 1 b); e) addition of a clear statement on EF launch condition requirement for MM source; f) change of “Detector” to “Power meter”; g) combination of Clause 7 and Clause 8 into a new Clause 8 titled “Details to be specified and reported”; h) addition of uncertainty considerations in Clause 7; i) correction of error in Formula (B.3).