标准摘要
[中文适用范围]： 该技术规范描述了一种表征渐变折射率多模（A1 类）光纤模态结构的方法。它对于评估与激光源一起使用的光纤的带宽性能非常有用。在光纤端面扫描探测光斑，并在指定的偏移位置确定光脉冲延迟。最快模式和最慢模式之间的光脉冲延迟时间之差是差模延迟。 [外文原描述]： This technical specification describes a method for characterizing the modal structure of a graded-index multimode (category A1) fibre. It is useful for assessing the bandwidth performance of a fibre used with laser sources. A probe spot is scanned across the fibre endface and the optical pulse delay is determined at specified offset positions. The difference in optical pulse delay time between fastest and slowest modes is the Differential Mode Delay.
英文名称Optical fibres - Part 1-49 : Measurement methods and test procedures - Differential mode delay