光纤互连器件和无源元件 基本试验和测量程序 第3-14部分：检查和测量 可变光衰减器衰减设置值的误差和重复性

[中文适用范围]： IEC 61300-3-14:2025 RLV包含了官方的IEC国际标准及其红线版本。红线版本仅提供英文版，便于您快速直观地比较官方IEC标准与前一版之间的所有更改。IEC 61300-3-14:2025提供了一种测量可变光衰减器（VOA）的衰减值设置误差和重复性的方法。VOA有两种控制技术：手动控制和电控。本文件涵盖了这两种VOA控制技术，以及单模光纤和多模光纤VOA。对于电控VOA，衰减的滞后特性有时很重要。滞后特性可按照附录B所述进行测量。本第四版取消并取代了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、定义及缩略语；c) 增加允许使用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 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. 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).