The 1030nm Polarization Maintaining Optical Circulator from OF-Link Communications is a Fiber Optic Circulator with Insertion Loss 1 to 1.5 dB, Isolation 22 to 28 dB, Operating Temperature 0 to 60 Degree C, Optical Power 300 mW, Return Loss 50 dB. More details for 1030nm Polarization Maintaining Optical Circulator can be seen below.