衡量激光器发射性能的参数包括（）、（）

OA子架的机架/子架的拨码开关是在（）位置

填空题OA子架的机架/子架的拨码开关是在（）位置

Please tell possible problems following the implementat...

问答题Please tell possible problems following the implementation of EDFA.

What is nominal central frequency?

问答题What is nominal central frequency?