The ISC-1550-FCUPC Model isolator features typical peak isolations of >40 dB at 1550 nm and very low polarization mode dispersion. This standard version comes with FC/UPC connectors. Use option code 10 when ordering other connectorized versions. Newport’s Fiber Optic Isolators are passive, fiber-pigtailed devices that reduce back reflections and backscattering of light (highly desirable in laser applications, for example).