光通信行业 40G光模块的MSA，用于40G光模块开发过程中的参考标准-MSA optical module of the optical communication industry, 40G, is used in the development of 40G optical module.

光纤传光中波的四种模式。内容属于光纤通信中的实验。-Four modes of optical wave transmission in optical fiber. It belongs to the experiment in optical fiber communication.