Product Name: Polarization Maintaining 3 Ports Circulator (1064nm) Description: These Polarization Maintaining 3 Ports Circulator devices transmit the incoming signal from port 1 to port 2, and another incoming signal from port 2 to port 3 simultaneously. It could be used to combinate with fiber gratings and other reflective components in DWDM systems, EDFA, high speed systems and bi-direction communication systems. It provides low insertion loss, high isolation, high extinction ratio and low temperature sensitivity.