问题
问答题 简答题
在测量光纤损耗时,多模光纤和单模光纤注入条件各是什么?
答案
参考答案:
对单模光纤用滤模器消除高次模,用包层剥除液去掉包层模;对于多模光纤,要保证光纤处于稳态模式分布状态。
在测量光纤损耗时,多模光纤和单模光纤注入条件各是什么?
参考答案:
对单模光纤用滤模器消除高次模,用包层剥除液去掉包层模;对于多模光纤,要保证光纤处于稳态模式分布状态。
Read, choose and complete. 根据对话内容,选择合适的选项,将对话补充完整。 | |
—Hi, Jenny. What day is today? — 1 Oh, are you wearing new pants? —Yes. 2 —I like your pants. They're red. 3 Do you like red, too? —Yes, but my favourite colour is purple. What's this in your hand (在你手里)? — 4 . Look, it's 5 —Ha ha ha... 6 —No, this is Danny's hat. 1. 2. 3. 4. 5. 6. |