Along with the extensive application of OLP in optical communication network will inevitably for a very long distance
large capacity transmission system route to take appropriate protection measures
EDFA and DCM is now widely used in solving ultra long distance and large capacity transmission system prior technologies to problems in OLP.For Xi Wu 40 Gbit/s WDM trunk in this article as an example
application of EDFA and DCM in long-distance transmission OLP system provide some reference.