The PIDI-AAAA-B-C-D-E-F-G from HJ Optronics, Inc. is a Fiber Optic Isolator with Optical Power 1 W, 2 W, Isolation 16 to 35 dB, Insertion Loss 1.3 to 1.5 dB, Wavelength 2000 nm, Polarization Dependent Loss 0.2 dB. More details for PIDI-AAAA-B-C-D-E-F-G can be seen below.