70年代和80年代最初部署光链路时,光纤/光缆制造商及其客户主要关注的是衰减,然后才是色散(请查阅我前一篇文章中的高速公路类比)。当时,人们之所以并不担心PMD是因为数据速率还不够高(那时2.5G的数据速率就已经被认为是科幻小说中的故事了!)。但是到 When optical links were initially deployed in the 1970s and 1980s, fiber / cable manufacturers and their customers focused primarily on attenuation and then dispersion (see the highway analogy in my previous article). At the time, people did not worry about PMD because the data rate was not high enough (when 2.5G data rates were already considered science fiction stories!). But to