The 980nm Fiber Isolator With PM980 Fiber Polarization Maintaining Isolator FC/APC from CivilLaser is a Fiber Optic Isolator with Optical Power 500 mW, 300 mW (Tested), Insertion Loss 2.4 to 45 dB, Wavelength 980 nm, Return Loss 55 dB, Operating Temperature -5 to 70 Degree C. More details for 980nm Fiber Isolator With PM980 Fiber Polarization Maintaining Isolator FC/APC can be seen below.