The PISI - Single Stage from HJ Optronics, Inc. is a Fiber Optic Isolator with Insertion Loss 1.2 dB, Isolation 16 dB, Operating Temperature -5 to 70 Degree C, Optical Power 1 or 2 W, Polarization Dependent Loss 0.15 dB. More details for PISI - Single Stage can be seen below.