550nm EDFA uses advanced pump laser 980nm/1480nm (JDSU,Bookham,FITEL)and CorActive ... efficient in the energy transformation.3) With plug-draw module. It could be changed as required to get ... . It could monitor precisely various status of the laser and also of optical input and output power to ... power, and to prolong the life span of the laser.7)With RS232 computer interface, RS485 standard interface ...