The ISOS-13-C-1-1 from AFW Technologies is a Fiber Optic Isolator with Optical Power 300 mW, Isolation 32 to 46 dB, Insertion Loss <0.5 to 0.55 dB, Wavelength 1310 nm, Polarization Dependent Loss 0.05 dB. More details for ISOS-13-C-1-1 can be seen below.