Targeting on the link optimization configuration problem for high-speed coherent optical transmission systems

a successive optimization principle based link EDFA gain configuration scheme is proposedto optimize the system performance improvement and tuning cost in irregular link configurations.The optimization object is to reduce the number of adjusted EDFAs in the transmission link when the optimal performance is achieved.Such scheme aims to reduce or even avoid the delay

transient and costs induced by the link power adjustment.The simulation results show that the proposed scheme can reduce the number of adjusted EDFAs from 8 to 4

when the system performance is still close to the optimum value.Thus this scheme effectively reduces the tuning cost caused by frequently adjusting the EDFA gain in the optimal configuration scheme.