The HPEBOI-1064 from OF-Link Communications is a Fiber Optic Isolator with Isolation 30 dB, Operating Temperature 0 to 50 Degree C, Optical Power 5, 10, 20 W, Polarization Dependent Loss 0.15 dB, Return Loss 50 dB. More details for HPEBOI-1064 can be seen below.